Choral swine education

There's a quotation out there that I can't find a source to attribute it to:
"Never try to teach a pig to sing. It annoys the pig and wastes your time"

There's a variation I like that goes: Never try to teach other people why you love what you love - it annoys the others and wastes your time. If people get it, they get it. If they don't, they probably weren't open to the idea in the first place, and trying to explain it to them might not be that useful. ESPECIALLY when it comes to things that are personal in some way and that one has emotional involvement in. Of course, this leads into the topic of different understandings of the nature of romantic love, but I'll save that for another time.

While spending a few minutes looking for the originator of the quote, I came across a kind of odd/funny parody quote about raising male children.