Can aroma determine one's sexuality?

[TimmyThink]

I have never come across a smelly gay guy ever. The majority of the guys who don't smell good are straight guys.

I believe there is some kinda chemical element to this or whatever. They don't need to smell bad or whatever. I have smelled some decent straight guys, however I'm not attracted to it. Even the good smelling straight guys, I know that they're not gay.

I believe that chemical is known as pheromones

I ripped this off wiki
Pheromone action in humans should not be confused with major histocompatibility complex interaction. Using a brain imaging technique, Swedish researchers have shown that homosexual and heterosexual males' brains respond differently to two odors that may be involved in sexual arousal, and that the homosexual men respond in the same way as heterosexual women, though it could not be determined whether this was cause or effect