They are primarily olfactory signals (smell) and are also said to be detected through taste and skin. Regardless of your orientation they work the same way.

Although the types include (but are not limited to) sex pheromones, men have specific and women have different other specific chemical constituents to their respective pheromone emissions.

The predominating studies in the field of pheromones involve the lower forms of life such as insects — but is an equally correlative entity to humans.

Now, for the clincher. It is conventional wisdom that the nature of pheromones is that of ‘animal attraction’ and the signal does not provide the emotional basis of attraction between two individuals.

And homosexuality is the result of the degree of masculinity or femininity of the brain. If a persons brain is too feminine, or masculine, he or she will have difficulty understanding how the opposite sex thinks and find it more comfortable with same sex. So here too the brain is the reason.

So pheromones affect the brain the same way regardless of sexual orientation. So a guy with a feminine brain should find a masculine guy more attractive and a girl with a more masculine brain should find a feminine girl more attractive.

They affect homosexuals the same way as heterosexuals.