Hello everyone! I'm a long time lurker (posts from this board have shown up with some frequency in my Google searches for some time, go figure? ;-)) and finally created an account a while back. I've been meaning to post on this topic for a long time and felt overwhelmed putting it together in my head, but I'll give it my best shot.
OK, so first of all I feel like I need to say that I don't recommend my sexual (and for me enemas are sexual in nature, mostly...) practices to anyone. After reading my experiences below you should have the good sense to know that what I do isn't at all safe for a whole variety of reasons. But of course few of us live our lives completely between the lines, most of us accept some risks. I'm not trying to minimize the seriousness of the risk, honestly, just saying that you should draw your own lines and reevaluate them as you see fit.
I'll try to give only the mandatory back story and can answer any questions later. I'm white, male, 43 years old. I discovered anal pleasure at a relatively young age (~10), initially using my mother's somewhat large (in hindsight) hard white plastic boring vibrator. Things stayed fairly tame until I could manage to get package delivery away from my home, which was when I was 15. I started to order all manner of toys including a shower shot. After a couple more years and stretching up to ~4 inches in diameter I got very interested in the great unknown, i.e. the rest of my intestines.
I bought a thin (maybe 0.75") foot long double headed dildo and with plenty of lube and great difficulty managed to work it through my sigmoid and completely inside of me. What I remember most about it now was how foreign it felt, how "penetrated" I felt in a way that I really hadn't before, even with my rectum packed to bursting (or so it seemed). I also remember that in those early days any penetration of my sigmoid produced copious amounts of mucus for a couple of days following. I took to stuffing a wad of paper towels between my cheeks sometimes because I was afraid enough would ooze out to be visible through my pants.
As my interest in depth grew I naturally started (needed, rather) to explore beyond the shower shot. Having gotten accustomed to the shower shot I started to order red rubber colon tubes and I simply attached them using various means to a shower hose with one end cut off. I'm honestly not sure why I never ordered a bag-style setup, but my cleanouts eventually evolved to a point where I'm really not sure one would work any more. I eventually got a fairly thick (or so it seemed at the time, 50 Fr so ~2/3 of an inch) and I believe 40" long. Before long I was taking it completely plus 6 or 8" of the hose it was attached to.
At this point I was regularly playing with the old Doc Johnson "Monster Dong" (or some-such) 30" double header and taking it completely. Not long after I met my wife, got married, got rid of almost all my toys, and for a couple of years anal play became a rare event for me, as did any sort of enema. But a few years ago I started to get back into it, with some degree of approval from my wife, only to find that cleaning out had become a big challenge. I think that before the break I played so often that I was almost always sort of clean except for thick lube coating my large intestine, so then a quick yet deep rinse seemed to do the trick. When I started back it seemed like I just couldn't get the water to the right depth. While struggling and growing increasingly frustrated by how few of my cleanout sessions actually resulted in the play I desired, I started to crave the feeling of the water and the rube deep inside of me. I had a rather long (60" I think) pretty thin silicone colon tube I got from Amazon, and I had some success with that for a while, but as I started to stretch my intestines back out I just couldn't get it to not kink.
I then discovered Silicone Nozzles, bought one 0.85" in diameter and 72 inches long (sadly they don't make those sorts of lengths any more because of safety concerns), and I haven't looked back. I take the entire tube, plus another 24 to 36" of the shower hose it is attached to fairly routinely, at least once a week but usually more. I can't always get it this deep so I do try to listen to what my body is saying, but I've also become intimately familiar with my internal anatomy after all these years so I can typically coax open a stubborn stricture or sphincter. I most often clean out with fairly warm water sitting on the toilet. I wish I could tell you, or even knew, the flow rate I use. It's not slow but not crazy huge either. Too fast and the filling becomes overwhelming before higher regions open up, too slow and it just takes forever to wash all the waste out.
I completely understand that some may say it's not the case, but I can tell you with certainty that I explore quite deeply into the small intestine. Getting in there is one of the trickier things to manage, even still today, but I can often times contract and loosen abdominal muscles to allow the tip to slide in. Beyond that the feeling is really extraordinary. There is less sensation than what I experience with the tube somewhere in my large intestine, but once I'm in there the tube slides deeper effortlessly and there is a sensation of pleasurable fullness quite different than what I feel at lesser depths. The more obvious way that I know I'm in the small intestine is that any solid waste is just small, mostly translucent chunks without any hint of brown as long as the recent meal(s) were easily and thoroughly digestible.
And of course, after cleaning so high/deep, as long as I don't spend too long doing it (I envy you bag-users and your isotonic water so much!) I (or my wife) can put whatever inside of me and be assured of what's in there. Neither of us is overly squeamish, but many of my favorite toys are multiple feet long and in my opinion one really does need to be cleaned well for that to be pleasurable and safe.
Well, I really hope to hear experiences of others who are into similar play, even if just to know that I'm not an anatomical freak. LOL Oh, and and I will reemphasize again that what I do is not at all safe. It's way, waaaay deeper than makes any sort of sense. In hindsight I sometimes wish I hadn't ever opened the Pandora's box that is extreme depth, because I'd probably get to play much more often if cleaning was quick and easy, but the regret was pretty mild when I was sitting on the toilet a few hours ago with feet of colon tube and shower hose buried in my guts.