"All short guys I know have been mean, or just not confident".

For some reason, I've found there's no way to explain why this would be the case to anyone that isn't a short man. Granted, it has only ever come up with people a handful of times.

I think it's either that they just don't really care and pretend not to understand, or that their lives are so utterly different that it's incomprehensible to them, like trying to talk to a lion.