Again, this is coming second hand from someone who was at first reluctant to tell me.
My parents devised an improvised retention device that was unique to their play enemas.
They did use it on each other at various times.
In the 1970s it WAS possible at SOME drugstores to buy what was called a "conversion kit" that would let you convert your "Faultless" brand Hot Water bottle into a full douche-enema syringe.
Would only work if it WAS "Faultless" brand
Mom only ever used one or two different bags for douching, so she had never taken the douche bulb her Mom bought for her out of the original box.
They had both figured out by "playing around" that "Faultless" brand used THE EXACT SAME THREADS in just two sizes right across their product line, Soooo, a hose stopper from one of their bags would fit perfectly on one of their bulbs.
One hot day during the summer, they were just hanging out. As their friends drifted to other places they started walking together and ended up going into one of the "big box"(for the times) discount drug stores They separated, as not to draw the attention of security, got back together, paid for what they had bought and left. Once outside, the first thing they did was check out each other's buys. Dad saw that "Conversion Kit" in there and he asked Mom, "What's THAT all about??" Mom said, "Walk with me!!" She starts for her house. They walk together, her house was farther than his. This was in 100 degree actual temp. So by the time they got to her house they both spent a few minutes guzzling all the ice water in the house and splashing sink water on each other
That was when Mom lead Dad into the bathroom and she got out one of her 2-US Qt faultless bags and finally broke the cellophane wrap on that douche bulb. She then said, "Now let's see if my idea will actually work!" She screwed the hose stopper from that "Conversion Kit" onto the bulb.
She unscrews the hose stopper from the bulb, puts the hose together with the enema nozzle attached. With Dad standing just outside the bathroom she takes the bag, mixes up a two-quart soapsuds enema and hands it to Dad. She then fills the bulb with hot water and attaches the hose assembly from the converter
She almost casually pops two extra-strength Ex-Lax like it was no big deal
She holds that steps out of her sandals and tells Dad, "Follow me, and don't let the nozzle touch the ground!"
She says "Here's the deal!" as she is removing her panties. When Dad looked, it WAS a control Brief!!
She says, "I am going to take soapsuds enemas like we've both done all those times, but this time when we get to the second enema, which is the one I seem to never hold 15 minutes, this is how I will get it to 15 minutes. I'll say 'Now!' and you stick the enema tube from that bulb into me. When I say 'Help' and breathe in, SQUEEZE THE BULB! I don't care HOW much actually went in, when I breathe out, release the bulb and let it re-inflate. Only hold it in if you need to so it doesn't come out, but DON'T let it come out!!
When I say 'Done!' follow me to the toilet following my breathing just like you were!"
Then she looks him in the eye and says "Got it?" He says "Got it!"
She went on the do 5 soapsuds enemas to get to a clear return
The 4th one clearly had food scraps from her breakfast in it."
She needed that tool for the second and third enemas that day but she DID hold everything 15 minutes