There is sex (body type - male, female, intersex, hermaphrodite, sexless/nondistinct), there is gender (identity and/or brain structure - man, woman, bigender, agender, genderless, fluid, queer, demi, gray, attack helicopter, ...), and it's occasionally important to make clear which you're speaking of. Transpeople are what happens when sex and gender clash. 
	Sexual orientation is a different matter and hasn't thus far been addressed, as far as I'm aware. 

[quote]I would like to point out that since the system used is a symbol system (meaning it uses symbols instead of words), that custom options aren't possible (or is at the very least more difficult).[/quote]	The site doesn't care whether it's a word or a tiny image. The worst it'd do is break the outlay a bit for long-usernamed people by being a bit longer itself - just move it under the user title or into the info section below, problem solved.