I've never been a professional teacher, but near the end of high school I ended up with a free period. I started out assisting my history teacher, but then the special needs teacher got sick and their substitute was having difficulty. So, I ended up half ass teaching half of her class for a period every day. Basically just occupying them so she could attend to the other half. That was a strange experience. There was one kid in there who was doing calculus (that I only had a tenuous understanding of, if any) and only getting credit for special needs math. He knew the material, and I asked why he didn't just take calculus. His reply was he was scared he might fail at it.
Like @Kaa, my daily prostitution is as a tech worker. Been doing some sort of support/admin role since 1997. I'm back in support these days, and I'm very happy, because I'll never be on-call again unless I decide to move out of my current position. However, due to how this industry works, I do end up providing a lot of free (or even paid) education to my co-workers, though. Heck, I've had the kind of embarrassing task of teaching something to the people I escalate tech problems I can't solve or file a decent bug for - and they get my escalations because they genuinely know the software better. They actually herd the coders and often tell them in detail how to fix the bugs I file. It kind of makes me feel good when that happens, but I do wonder how I know something they don't.
In my bass playing/musical life, I've decided that I need to do some sort of cover of this song, whether I can convince my band to do it or not (the singer's definitely into it). Also, I want Eno's jacket. He looks like a terrifying suburban trophy wife.