Not for a friend, but my father is my only parent, I've never known my mother.
My father was raised in an all-boy family. His mother was totally anti-enema, and he had to satisfy his curiosity behind her back.
Once he discovered that I enjoyed enemas, he decided that he was not going to allow me to do them behind his back, and got me to open up to him.
One time during my sophomore year of college, I was home for winter break, and I told him I was heading across town, a good distance away to a particular specialty store, and I asked if he wanted anything from there.
He told me,"Not from there, but on the way back, can you roll by XXX Drug, and pick up a couple of those Fleet Bisacodyl mini-enemas? That is one of the few places that actually stocks them with the other laxatives, you don't have to ask at the counter.
I'm planning a cleanout for the day after you go back, and it's likely that neither of us will get over there for a while. I HATE the bisacodyl suppositories, they're so erratic!"
I said "Sure." I did exactly that, but I got 3 and used one myself in a system cleanout I did on the next-to-last day I before I went back to school.