Jennycooper1948 - This is what I came up with that produced the most satisfying ongoing cramping in me.
When I first started looking for ways to keep the cramps coming, my initial approach was to take two quart enemas using increased strength of the harsh solutions (lemon juice, glycerin, glycerin and Epsom salt, heavy soap, etc.) that made for cramping in me. These indeed, produced the results for as long as I could hold them in with a butt plug, but the cramps didn’t last long after I had expelled. When I did more of the same as a series, the amount of time I’d be able to hold each succeeding one diminished and, often, I’d get pretty nauseous. A couple of times the nausea resulted in unwelcome stuff spewing forth from the north end making a mess. I’d feel lousy after a session, with my bowels in an uproar. It seemed I wasn’t getting any closer to what I was looking for.
So I changed my approach. I started out by tapering off my intake of solid foods for about a day, particularly high fiber stuff, to reduce the bulk in my system. I increased my intake of nutritious drinks and broths to stay energetic. I’d then take a mild 1 1/2 quart soapy enema followed by two 1 1/2 quart clear water bags. The mild soap and clear water enemas were to clear the right of way in my gut of solid chunks, without bringing on cramps or making my innards all churned up. It wasn't necessary to irrigate ‘til clear, but just enough to go from plopping to squirting.
I’d been relying on chemical irritation of the intestine and decent volume to bring about cramping. I decided to try “gas pains” to produce the cramps. The question was whether I could keep the waves rolling for as long as I wanted.
I began by shooting two or three doses of water based lube into my rectum with a lube shooter. I then started inserting my colon tube (32 Fr, 30") attached to a short length of enema hose with a clamp which was then attached to my Higginson syringe. It was important to go slowly, using the old in and out method, making progress forward a little at a time trying to avoid the tube doubling back on itself. The Higginson was not used to squirt in a solution. Rather, I used it to puff in little bits of air, widening the Hershey highway for the colon tube as it negotiated its way around the bends in its route. It was important to only squeeze in enough air to keep the tube moving forward as I fucked myself in the ass with it. Too much air induced too much cramping too early, messing up what I was trying to get done - kind of like eating too much in the way of appetizers can spoil your dinner. The times this happened, the cramps became so severe shortly after I got the mixture in that I had to fart and I shit it all out of me - an intense happening to be enjoyed if in the mood, but not on the agenda.
When I got the colon tube in as far I thought it would go (very often, but not always, about the full 30"), I'd close the hose clamp and disconnect the Higginson. I have a metal veterinary ear/enema syringe (you can get them on eBay) that holds 8 oz. It's easy to clean and the backside unscrews, making it easy to load when I want to get thick stuff up my bum. I found, through trial and error, that mixing up 1/2 cup milk, 1 cup yoghurt, and 1 cup honey, (making a little more than a pint) was just about right in mixture and volume for me. A quart or more had me prematurely fighting the need to evacuate because of the volume. I wanted waves of barely manageable cramps, not unmanageable fullness.
I'd spoon the thick mixture into the syringe, hook it up to the enema hose, open the clamp and push down the plunger. My poop chute, eagerly awaiting its dinner that was also sweet enough to be its desert, usually would be disappointed for very little or none of the mixture would make it out of the colon tube. Round two was close the clamp, reload, and fire. Round three would use up the last of the mixture. There'd still be a bunch of the sweet stuff left in the hose and tube, so then I'd reconnect the Higginson and pump the tubing clean (being careful not to use more air than necessary).
After I removed the colon tube and the cramping started to build, I needed to decide whether or not a butt plug for retention needed to be put in. If I were going to be lying in bed or on the couch, I wouldn't use one as long as I had an absorbent chuck underneath me. I had the luxury of living alone, so I could remain naked. As long as I stayed reclined I never felt the need to evacuate (the small volume helped). The urge to fart was another thing. The air pumped in by the Higginson and the gas generated by the little fellas working on the milk and honey, made for gas pressure city. When I'd feel the urge to cut one building up, I'd get in the knee/chest position and stick my ass high in the air. I'd relax my sphincters and remembering never to trust a fart, I wouldn't push. As long as I didn't push and could keep my asshole from clenching up, the gas typically would seep out, relieving the pressure. In the dozen or so times I did this ongoing cramp thing, I never had a significant escape. A couple of times I had a little bit of brown liquid come out with the gas and run down over my cock and balls, but they were very small amounts and hardly made much of a mark on the chuck beneath me.
If I wanted to spend my cramp time sitting up or walking around, I learned from messy experience that a butt plug was in order. The pressure building up from the pumped in air and generated gas still had to be dealt with but, now gravity was additionally pulling the sweet mix down into the rectum toward the anus - most definitely, not a time to trust a fart.
The first time, after getting this approach to ongoing cramping refined (I thought), I decided to sit up as well as walk around a bit. The plug I used had served me well for enema retention - long thin neck and big enough head to seal things up pretty well. What I hadn't factored in was that in enema use, I'd pull the plug when I was sitting on the toilet and the enema would follow it out. The picture is probably obvious. I happened to be walking around when the first urge to fart started building. I got on the floor and stuck my ass in the air. The pressure continued to build and the urge to fart became overwhelming. I reached back and liberated the plug. There was no sound of explosion or the roar of a river in flood, but I knew something not to my liking had happened. I pushed the plug back in to prevent further volleys and turned to survey my work. The volume was not great and I hadn't hit the far wall, but the array of brown stains on the rug and one chair were impressive enough to show my aptitude for what is now called enema art. I headed for the toilet, sat down and this time I did push. The results were some impressively high volume farts and some brown liquidy stuff. When I thought nothing more was coming, I wiped, relubed, and put the plug back in.
I began cleaning up the mess. The cramping continued, but the frequency and intensity of the waves diminished a bit. However, they were still strong enough to be very satisfying. The urge to fart continued, but it didn't get severe enough for me to get down on the floor and put my ass in the air. It was like being in polite company and you can't get alone. You feel a fart coming on and it feels like it's gonna be a dandy. Will it make loud music? Will the smell wilt the flowers in the centerpiece? There's no old person, nodding off sitting next to you that you can blame it on. What to do? But the fart never comes. The urge is just strong enough to be very distracting. That's the way it was toward the end of this session, still good cramping and decent fart pressure.
I didn't keep track of the time, but awhile had gone by, when I noticed it was time for bed. I took a pretty large soapy enema to get the stuff out of my system. Even though the effects had quieted down a bit, they were still strong enough to keep me awake. The enema seemed to do the trick and I was able to sleep pretty well. I was halfway awakened during the night by some cramping. Half awake, I remember letting off a massive fart, then falling back to sleep. In the morning I was no gassier than usual and there was no cramping. I really felt nicely satisfied.
I learned a couple of things from this particular session. The first was if I were going to follow this routine for cramping and I wanted to sit or stand up, I needed a butt plug that would allow me to release gas without having to pull it out. I had an enema dildo nozzle that wasn't perfect, but worked just fine. I attached a short piece of soft enema hose to the nozzle that had a plastic hose clamp on it. When I was in the ass up position, I could reach around and open the clamp, letting some gas out. Some brown stuff often came along with the gas. Not much, but enough so that I didn't want to be doing the cheek salute on the rug without an absorbent chuck under me to catch the drippings. Otherwise it was linoleum or tiles as cold hard sites for this activity. Drippings aside, the dildo worked well enough to keep me from creating any more enema art. Just a hunch, but I think that the dildo was too long. I had some ideas for a better plug to use for play, but my ability to cavort in this way left me before I could get something made.
The second lesson came from the utility of the mixture. I put in the yoghurt, not only to add critters to the gut, but to serve as a binder that would coat the intestinal wall with the mixture. The idea was that some cramping would continue even if a bunch of the mixture was lost. This seemed to have happened. I don't how long the sensations would have kept coming if one wanted a really long session. Mine were usually around 4 - 4 1/2 hours long, with one that went 6 hours (too much for me - cramp slut though I, at times, be). This included from the initial cleanouts to the final cleansing, and all the cramping and farting in between.
I'm hoping that my long ramble stimulates some thinking that helps you develop your own approach to get you where you want to go. I'm no help on the anal warming. My experience has been limited to ginger, Vicks, and some pretty caustic bar soaps. I will offer you an opinion that you didn't ask for and probably don't need: please be careful and take it gradually with some of the stuff that can be played around with for anal warming. If it's true that you can desensitize some of the wonderful nerve bundles we have around our assholes by playing unwisely, to do so would be enough to make a person permanently pouty. Remember - a robust asshole is a terrible thing to waste