Yes, often. And the first time I was still a little girl.
When we were kids, my younger brother was suffering from constipation, so Mother was often forced to give him a laxative enema.
Unlike me, that I've always loved enemas, he hated them, therefore Mom went mad every time in giving to him.
Seemed to me very unfair that he always repelled what instead I would have got so gladly.
Thus, during yet another whining, I threw out this suggestion:
«Mom, give it to me. I'm more brave than he is!»
«Not true!» snapped irritated my brother.
«Come on Mom, let him see that it's true!» I insisted, pulling down my panties to the knees.
Our mother, puzzled, at first hesitated, then, hoping that the example could serve, acquiesced.
For me she didn't use the laxative solution, but a bulb filled with simple lukewarm water administered to me over her knees, in front of my stunned brother.
He watched sulkily and, when it was his turn, got the enema without a murmur, to great surprise (and relief) of our mother.
The next time, given the previous results, Mom asked me a little hesitant:
«Claudia, do you mind if I give also to you a bulb of lukewarm water?»
I didn't displease at all, nor on that occasion nor in the following ...