My nephew recently had a birthday. It's hard to believe that the varmint is in his 30s now. Or that I'd still call him something like that.
Anyway, I probably taught him most of the obnoxious little tricks every adolescent boy loves to learn. Inadvertantly, of course - I'd always tell him he shouldn't do X, and then explain X in detail. Things like "if you answer the phone and it's a boy asking for your sister, don't tell him 'she's taking a huge dump right now'". Somehow he kept getting the wrong idea.
(It was probably good for him though. I wasn't always around to help him. So, like the boy named Sue, he learned how to fight for his life against older, bigger, dirty fighters, which could serve him well in later life.)
We're both older now, so we wouldn't do things like that any more. We have younger relatives for that.
Anyway, in a few years my nephew might even be in the market for products like Rogaine. So he, and perhaps you, should know that you can't let cats consume Rogaine, because it can cause a fatal drop in blood pressure. And if you get any bright ideas like treating baldness on a cat with Rogaine, you should know that the cat will wind up consuming it as it licks itself.
This and other tidbits on the Hair Loss Blog.