When I was in school at 17 or 18 I had ruined my favorite sock by putting my legs on the table with my feet to close to a candle. I had heard of darning socks, although I'd never seen it, so I wanted to find out how it worked so I could mend my beloved sock. Neither my parents, grandmother or aunts knew how to do it (although I suspect my grandmother lied) so I took my sock to school to ask the 'textile' teacher how to mend it. She didn't know either. In the following week I asked all older female teachers if they knew how to darn socks until my sock became a running gag in class. So as a joke I asked our 28-ish, tanning bed brown, musceled, ski-instructor like PE teacher. Class started 5 minutes late that day because he took his time explaining very clearly how to proceed with my sock, and I have worn those socks for years after

A very nice lesson in prejudices it was too!