Random memory: when I was a kid, whenever I was into something new, my mother would ask the parents of my contemporaries "So are your kids into N?" This would cause a lot of grief for me because I didn't follow the crowd, so when I was at certain delicate ages my life would become a living hell because everyone would find out that I liked Star Trek/Bjork/saving the lowland gorillas/whatever.

In retrospect it was also insulting, because it shows that my mother thought my tastes weren't my own and I must be copying someone else.