I'm not making a joke. On your other thread right, you said you hate people making assumptions about somebody elses gender. The thing is, let's say I'm in the store and there's some bald guy with a moustache, with make up on in a woman's dress. Now I know that's an extreme example, but what do I assume that person's gender is? Do I say hi sir or miss? But if I don't know the persons gender chances are I could cause offence.

Remember you make it seem like I'm a close friend to the person. The vast majority of the time you come into people once in your life and not see them again.