While I’m sure they have homosexuality like anyone else, I think the sexual repression is more of an issue. Imagine moving from a culture where women are completely wrapped in bags to one where some dress like streetwalkers, and your family would never approve of you getting involved with the “streetwalker”. Their societies are very segregated in terms of gender; Muslim students described to me how they couldn’t get Muslim women to attend their social events because of social norms. In their own countries opportunities to sow their wild oats were very limited; they said you had to find a “troubled girl” (who had basically been disowned by her family for being promiscuous).
Mohammed, he founder of their entire culture and civilization, was a homo.