I've manufactured a plugging "rig" out of an oral syringe and the tube from the inside of a windex bottle (got the idea from a post earlier in this thread). The fit of the tube into the nipple-end of the syringe is perfect and I've further secured the press-fit of the tube into the syringe with a few dabs of loctite. I left all 13 or so inches of windex tube, uncut/unaltered, so that I can cut it to the appropriate length after I get advice from you good people.
Question: how far into the rectum does one have to insert said tube?
I've read almost the entire thread, and I've read that inserting anywhere from 2-5 inches will bring the desired results. Well... Is there a happy medium in this regards? 2 inches doesn't seem quite long enough, but 5 inches seems a bit too much. I've never put anything up there before (I've always used it as an exit only) but looking at 5 inches of thin tubing, and imagining inserting it... I don't know about you, but it looks to me like it's a bit excessive. 2-3 inches looks like it'll be comfortable enough, but 4-5 inches seems a bit too much.