If your mother spat out a few boys already before you came along, then you know the pain of having your older brothers constantly questioning your sexuality. You may be interested to learn that, according to science, they were right to do so: Having older brothers increases the probability that you will be gay.
It's called the Fraternal Birth-Order Effect, and it's quite clearly documented. For each son a woman produces, the chances that the next one will be spending his first 20 years inside a closet increase by 28 to 48 percent. By the fourth or fifth, you might begin to notice a puzzling affinity for musical theater.
Now, keep in mind the base rate of homosexuality is low already, you would need over 10 brothers before your probability of being gay propelled over 50 percent. Still, it's estimated that one in seven gay men can attribute their sexuality to this effect.
And they can take one hell of a photo.