I awoke one morning when I was about 7 and my mother didn't seem to be around. I retrieved the rectal thermometer from the bathroom and took it back to my bed, happily lying on my stomach inserting and withdrawing it. When I finished, I got up and just as I went through my bedroom door I heard my mothers voice.
"Do you have a fever?"
I froze. She told me that if I liked things in my bottom next time I was caught she'd give me a quart enema. I actually tried to get 'caught' a few times but was found out unexpectedly.
My stepmother actually did some of the things my birth mother had threatened to do. Finding a greasy rectal thermometer under my bed got my temps taken that way a few times. Catching me giving and receiving enemas twice with other kids got me four soapy enemas the first time (age 13) and twice a day for a week at age 14. (Which I secretly loved, even got a r/t twice by sarcastically saying "spose your gonna use the pink thermometer on me too".)
Once, after catching a male friend and myself with a bag, (and both nude), I told her I needed it so she made 'David' give me a full bag and made me hold it for several minutes. The next morning, She repeated the process herself.
At about age 16, my stepmother must have tired of finding the thermometer. She made me buy a new oral one for the family and let me keep my vet thermometer. When I was 'sick' in high school I would often insert my thermometer, lie on my stomach and wait for her to come in to wake me (I was usually covered, although a couple of times let the blankets 'slip'. She would see that pose and ask if I was sick, one time even checking to see if it was really in. I even resorted to doing my temp in the family room in view of female cousins. She told me to cover up or go to my room. She also made me buy an enema bag from a female clerk after catching me with hers That was embarrassing.
Although I later tried a few times to get her to give me an enema, after about age 16, she would only prepare it and hand me the tube.