The benefit of being in the
unmarked category, which prevents one from being singled out as the target of
homophobia and all its nasty
side effects. Straight privilege means people won't mind if you talk to their
kids or their
spouse, or if you work with them.
With it, you won't get
fired,
beat up,
harassed, or otherwise
put-upon because you either are or
appear to be straight.