Colon tubes and those inventive Japanese enema enthusiasts And what's the most interesting thing you

I've always watched in amazement (or rather Disgust) At the interesting things Japanese folks inject into their backsides. It seems they really have an affection towards those oversized glass/acrylic syringes. It makes things look out of this world, but given the amount of air taking up most of the room in the young lady's colon, they don't get much "material" injected very deep inside.I would think that I pretty good-sized colon tube (deeply inserted) would allow you to inject just about anything in their while displacing any air already present inside. I guess my question is what is the most interesting thing you have ever "injected" and how you did it? I thought the idea of kind of loose gelatin would be a lot of fun, especially if you have an enthusiastic partner.

I really enjoyed all of the informative posts here. I'm glad there are folks here with a good head on their shoulders!