Uh, do you even know what being gay means?
Maybe they're just comfortable with one another?
Maybe they don't abide by typical heteronormative laws that state a man must be manly and show no affection towards another man?
Maybe they just like to play around?
Americans are very ignorant when it comes to sexuality. Sexuality in other countries is not as taboo as it is in America. In America, a guy is gay if he smiles at another man. It's ridiculous.
Stop.