My mother stopped giving enemas at puberty, nothing else was said, I’m sure she knew she had me hooked, and I had both motive and opportunity with both parents working a set schedule and equipment readily available. After she stopped I nearly got caught once, when my dad came home early, but I was able to get everything put away before he noticed.
There was a time when girls got my full attention, and I was more interested in trying to get laid than give myself an enema, but I always managed to ask my dates if they ever had one, and in those days they all had!
But if mom suspected it, she was mum about it, and my dad spent his life being clueless about most things, oh, he was a good dad, and a good provider, but until he got older life kind of passed him by.
After my wife went from being a willing partner to deciding I was some sort of pervert it was back to motive, opportunity and extramarital enemas. I never felt guilty about that, I had been up front with her and she been a willing participant, and then one day...