On of my first colonics was given by a male in a health club in Los Angeles, nearly 50 years. I was probably the worst colonic closed colonic I've had. BTW, all open system colonics are hardly worth the effort, for me anyway.
My next two were in the 80's, a gay male who was far too rough, ex Navy corpsman. I never went back.
No long afterwards I participated in a threesome, the female was into everything, and loved simultaneous anal and vaginal sex. The session started off with me getting an enema from him, while she watched. The it was her turn, and while she was expelling he and I had a lot of anal play, followed by my giving him an enema and having great sex with her. She was a recent divorcee that wanted something more than hop on, squirt, hop off.
Next she played with me while he was having anal sex with me and vice versa.
I know, silly as it sounds, I could not have done this without a woman present. When I was a teen my ass was open to anyone who would put a cock (or anything else) into it.
The last time was a foursome, 2 women and 2 men, the other male became the centre of attention, each one of us fisted him, clear up to the elbow. Now as hard as I've tried I only had one partner with a hand small enough to get into my anus, but once inside, OMG, to have that done again! So I have to settle for Silicone Nozzles, and love them.
So my answer gives at bit more information than requested...