I think Antonio was trying to say that gay people don't use "straight" the way straight people use "gay"--as a synonym for stupid. I personally have never heard a gay person say "Ugh I hate work...it's so straight!" or "it's so hetero!"
(because we all know gay people have more class than straight people, fact.)
I meant that I find the use of a word like "straight" to qualify heterosexuals to be pretty disparaging toward homosexuals, by suggesting that heterosexuality is the straight practice and that others are deviant.
I think you are being "more catholic than the Pope" here. No gay person seems to be annoyed by that use of straight, yet, you seem outraged by it.