This may have been discussed before, but I see a number of new members, so I will bring it up again.
Many years ago my dearly departed first wife said she thought it would be fun if we took an enema together from the same bag, that maybe I could rig something up.
Knowing we both liked two quarts I got a Y and a T connector.
I plumbed the two bags into the Y, then a short piece of hose to the T. Ok, some of you have already figured out where this Is going.
Then larger latex hose to two colonic irrigation nozzles with the T in the middle.
Now before I go any further, let discuss safety, we are two people who have been together exclusively for several years. We have had both anal and oral sex, had tongue to anal contact, etc., so while she wasn't thinking much about it I was assessing the risk, which based on our activities I felt was minimal.
So the night comes and we hook up. I wish we had been able to measure the flow to see who took the most, but I suspect I got more than Peg. With the bags about half empty I shut the clamp on the section of hose weteen the Y and the T.
Then we start the game of trying to get the water going between us. We had enough hose that just by changing positions we could get the flow going either way. She really got off on swapping the fullness, until we decided to settle back and opened the common hose and empty the bag.
Now we have only one toilet, a problem we later solved by buying an invalid toilet. But this night it was ladies first, so while I sat on the edge of the tub she did her thing and vice versa. When we were both done we had super sex, and no health issues.
Next time we tried it she decided she wanted to give me her enema, see we clamped off my hose, she filled, then got on top. It was great, and with ladies first again it was clear that I probably had 90% of her enema in me.
We would play with this set up frequently, often having intercourse and trading top to bottom in the process. We did find that worked best if we had about a quart in each other, if we both had two quarts we could easily get a too full feeling and not have as much fun as the water flowed from one to the other.
When I made some improvements using clear tube between us, she didn't like it, it bothered her to see the poop going back and forth, so back to latex tubing and it was fine.
It seems sad that two people so into kinky sex didn't stay married, but she was in love with a woman and parted friends. But for years, when we could, we got together for enema play.
Sadly she died of liver cancer about 10 years ago at 58.
I mentioned the Invalid Toilet, one thing Peg loved was for me to watch her expel, so we had the toilet set up so I could see it all. I could even reach in and do some fingering, which she loved, that feeling of really have to let go and me there stopping the flow. She'd also ask, "I've got to drop a load, would you like to watch." So that took me back to my childhood experiences of watching Janet "poo" outside. While we weren't into scat, she did enjoy a finger in her anus as she tried to push out and I pushed back. I also knew once we cleaned up there was going to be good sex.
And, yes, we did have anal sex with her filled with enema, sometimes both of us filled. And yes she liked to do the finger in tha anus push back for me, too.