I take a series of two every 8-10 days. I now have quite bad benign prostatic hypertrophy (BPH) and have to take tamsulosin HCL plus do regular prostatic massage to keep on peeing comfortably. I do the massage with a long shampoo bottle about 50 mm (2") diameter. I have a measure of megacolon, too. To get the shampoo bottle up me, I get into the shower, loosen my anus with soap and fingers, then work the bottle in just beyond the inner sphincter. When it will go easily, I take it out and kneel down in the knee elbow posture. Taking a bulb syringe with just a spoonful of water, I spray the water into my now almost vertical descending colon and add about 600-700 ml of air before re-inserting the shampoo bottle all the way (about 190 mm or 7.5").
This results in loud farts, but has the effect that no faeces stick to the bottle (nice and clean!). Then I can stand up and my anus closes round the bottle's narrow neck. I finish washing, then begin a slow but firm prostate massage. I can't get hard any more, but it is most enjoyable. Finally I wash off the prostatic fluid and dry myself.
This process pushes the faeces up into the descending colon, where they remain while I sleep. Because of my very wide colon, my bowels don't move by themselves between enemas. The faeces just pack together. It's not uncomfortable until about day 7, but then I look for time to do an enema series.
I use my siphon bucket with five tablespoons of salt and three of Epsom Salt in 5 litres of water. To this I add 3 tablespoons of baby shampoo to make it lubricating. It is administered via a long 42 Fr colon tube inserted well into the transverse colon.
I can hold with difficulty for 10 mins, after which the avalanche of muck usually blocks the toilet and the level rises to meet my scrotum. I finish with an 8 litre plain water rinse.
As the professionals say, don't try this at home (unless you are built like me). But I like it! I guess I'm still an anally retentive child at heart.
Johnny