The problem with labels is that they lead to stereotypes and stereotypes lead to generalizations and generalizations leat to assumptions and assumptions lead back to stereotypes. It's a vicious cycle, and after you go around and around a bunch of times you end up believing that all vegans only eat cabbage and all gay people love musicals. (For the record, I find musicals very unrealistic. If I suddenly turned to Portia and burst into a song about how we're out of orange juice, I don't think she would just immediately join in. I think she would be confused and concerned for me.)