I doubt if this will work for humans (for one thing, I'm pretty sure that my heterosexuality has nothing to do with my sense of smell), but it does show that sexual orientation is a lot more complicated that most people want to think.

Actually, there is some evidence (not all that strong, admittedly) that human sexual orientation is influenced by individual response to pheromones. You wouldn't necessarily know this was influencing you, since the pheromones would operate at subconscious level.

Actually, there is some evidence (not all that strong, admittedly) that human sexual orientation is influenced by individual response to pheromones.

This doesn't explain my response to images. I (strongly) prefer Playboy to Playgirl. No pheromones involved there, other than my own...

"No pheromones involved there, other than my own..."

Mr. Simberg,

Do you REALLY know what goes into the pages of those magazines? Do you? Really?

How do they know the straight fruit flies from the gay fruit flies? Do straight male fruit flies prefer melons and gay male fruit flies prefer bananas?

And why do we care why people are gay? This is just another study that "proves" one sides assumptions over the other sides about "why" this occurs. I'm sick of the whole matter.

How do they know the straight fruit flies from the gay fruit flies?

They see which flies a given fruit fly attempts to mate with. Not too complicated.