Hair
I have long hair and this invokes one of two assumptions:

1. I must be gay.
Yes, in this day and age there are still some people (even in the UK) who believe that I must be trying to emulate women (despite my beard) -- which no self-respecting manly man would do, of course -- so I must be a raging ass-bandit, ready and eager to rape their young (as they probably are themselves).

2. I must play the guitar, or at least be a metalhead.
No, I don't play the fucking guitar, and, no, I don't listen to metal or rock (anymore). No, I don't want to talk to you about Black Sabbath. Or Iron Maiden. Or Bon Jovi. (Or Queen, when the two assumptions collide.) As a matter of fact, I probably don't want to talk to you at all, especially not about anything relating to guitars or music.

I have never felt like making conversation about other people's follicle habits, so why do others feel compelled to make conversation about mine? I do not understand this at all.
(quimbayah, Wed 7 May 2008, 14:02, 2 replies)

Yes.
This always used to puzzle me, when I had long hair. It surprised me how many times people would shout 'YER FUCKIN' QUEER!' at me. Don't you know that the vikings had long hair, and they're some of the most manly men to have ever lived?
(Half of Stephen Fry's right buttock pissed on your dog on, Wed 7 May 2008, 14:17, closed)

I have short hair these days.
But in the days when I sported a shoulder length mop it puzzled me no end that people who would happily step over me as I lay bleeding in the street would go out of their way to let me know that I needed a haircut.
(Big D, Wed 7 May 2008, 15:40, closed)