My primary reason is the feelings; but anticipation of the feelings is almost as good. It starts long before the enema, with looking forward to it. What nozzle shall I use? Perhaps I could make a new one? What would feel best? An inflatable one, mmm? Yes, that would be great!
Mustn't make it too long, now (at least the inflatable sleeve) - about 5" should do. I'll will need some firm plastic tubing of the right diameter to fit inside a cut-up mountain bike inner tube loosely (but not excessively so because I'm going to lash the two together and hope for an airtight seal). Here I will use electrical conduit tube, which is freely available in hardware stores. The bike inner tube is about 25mm (one inch) deflated. I'll buy one with a valve of the Schräder type. After some experimenting I have found out I can comfortably insert an object like a banana about 120 mm up my rectum; so I cut the plastic tube about 50mm longer than this. Next I will carefully mould epoxy putty over one end of the plastic tube to form a rounded nozzle end that will completely cover the rough end of the plastic. To keep the hole open, I use a roll of paper in the end of the plastic tube. My epoxy fairing will only be wide enough to smoothe over the hard tube end, and about 20mm long.
Now comes the hardest bit. I am going to sleeve the hard plastic with the neoprene inner tube from the bike! I am aiming to lash a cut end of the inner tube round the firm plastic with dental floss. I push it up behind the epoxy nozzle end when it has hardened, and lash it there firmly with dental floss to make an airtight seal. Then I make the inner tube to fold over itself so that there is an 'S' shape to cover the lashing. When it is inflated, the rubber will overlap both the lashing and the back part of the nozzle, leaving just the tip poking out.
BEFORE I cut my inner tube I judge where I want the valve stem to be on my finished homemade inflatable nozzle. This will rest against my anus outside, and prevent the nozzle from being drawn into me any further than I want. I cut enough inner tube, with the valve positioned about 40-50mm from the outer end and sufficient for the inner end for the amount that will be inside me, plus an allowance for the 'S' overlap and the lashing. The outside end of the nozzle is again finished off with a lashing of dental floss that will seal the inner tube to the firm plastic beneath. I cover this with a further sleeve cut from the same inner tube, doubled (I have lots left over!).
To make this affair comfortable, I make a further sleeve of a doubled layer of inner tube, about 40mm long. I slide this over the completed nozzle from the business end, using some talc to lubricate it to get it to go easily. I slide the sleeve, cut ends first, up hard against the valve stem of the inner tube. Its purpose is to stop the outer bit of inner tubing (the bit that stays inside my anal sphincter) from inflating along with the rest.
My nozzles are about 120mm long from valve stem to tip. If you try this, you must not make it longer than you can manage with comfort, and human rectums come in two sizes - short and long. Mine is long! The nozzle will easily inflate to hold 800-900ml of air. and I promise that you will not leak a drop! I fit mine with Gardena hose fittings because you can buy these with non-return valves in them, and then you can disconnect yourself from the tubing and bag and just leave the nozzle in place for the trip to the potty!
Making the nozzle is filled with pleasurable anticipation. Actually sliding it in for the first time is awesome! I attach the pump (ordinary bike pump) before doing this. Even deflated, the new nozzle distends my rectum a bit; but when I pump it up, the feeling of fullness is fantastic. How far can I go? Six strokes of the pump and my rectum begins vigorously trying to expel the invader! Ah, more pleasure! I rest for a while and the urgency passes. Two more strokes, then four! Wow, really, really full - and I haven' even got to the enema yet. Disconnect the pump, and enjoy the sensation of walking around with the nozzle stuck up your bum! Very naughty feeling...
The nozzle is so long that its inner end is squeezing my prostate, and I'm leaking prostatic fluid through a hard erection. But it is also constricting my urethra. If I forget to pee before inserting this, I can't do so with it in at all.
Now for the enema itself, the bit I've been waiting for... I like seawater, and I have five litres of it in my bucket which will be delivered through a siphon (1/4" clear plastic hose stiffened with 12 gauge copper wire at the siphon end so it will hang securely over the rim of the bucket and reach comfortably to the bottom. I start the siphon, snap the hose connectors together and await the stealthy increase of pressure inside me (Ah!).
After about one and a half litres are in me, the cramps start. Now I know the seawater has come to the sigmoid flexure of the bowel, and is seeking to go further. I let the pressure rise some more. Now I am really uncomfortable; but not a drop is leaking from my anus, stuffed with this tight-fitting monster nozzle. I stop the flow and wait. Presently there will be a loud gurgle, and the pressure will drop. I enjoy the relief and start the flow again. The water is past the sigmoid and now keeps it open. For the next two litres all goes smoothly, and my stomach swells steadily. The it starts to get genuinely full, and the last litre or so goes in increasinlgy slowly.
Now I can disconnect the hose and waddle around full of seawater, perhaps to look at my swollen belly in a mirror somewhere. Presently the cramps start in earnest, but I can hold this for at least ten minutes. While I do this, I anticipate the eventual release. Shall I deflate the nozzle, or try and push it out? It will be almost 3" wide by now, but of course I can squeeze it smaller to get it out!
I wait and wait for a nice strong urgency (like a surfer waiting for the big wave!). Tonight I will push the nozzle out! This takes a lot of pressure, but the sensation of the nozzle starting to move is exquisite, stimulating my prostate and stre-e-etching my anus (ah, ah, aaahh!!) until all of a sudden everything comes loose with a rush!
The first rush is nearly clean water. Quick, flush the toilet and retrieve the nozzle. Just looking at it is exciting all over again. I had THAT big thing up me?? Now I settle down to enjoy the rest of the expulsion. I like the feeling of large quantities of water and waste rushing from my body, and there will be at least four of these, all different. I will enjoy every one!
Hope you all do, too!