When I was a young boy, I suffered quite regularly from bouts of constipation – and my mother’s regular cure for it was an enema. I hated these with a passion because they were so embarrassing.
I found them embarrassing for two reasons. Firstly, especially as I got older, there was the natural developing modesty of a boy having his private parts exposed, and then performing an intimate bodily function, in front of a member of the opposite sex. But the second (and main) reason that I found these occasions embarrassing was the position used – I had to go over my mother’s knee in exactly the same position she used for spanking me.