The afterlife isn't just female virgins. Here is how the boys are described:
(QURAN 52:24): "And there will go round boy-servants of theirs, to serve them as if they were preserved pearls."
(QURAN 56:17): "They will be served by immortal boys."
(QURAN 76:19): "And round about them will (serve) boys of everlasting youth. If you see them, you would think them scattered pearls."
In addition, there is a great deal of discussion of this in the Hadiths and Post-Islamic Arab poetry. For example, in one of the Hadiths, Bukhari's Authentic Traditions, Book LXII (Marriage), Chapter 25:
As for whom(ever) plays with a boy: if he caused him to enter him, then he shall not marry his mother.
Another example, from the poem 'Perfumed Garden', by Abu Nuwas:
O the joy of sodomy!
So now be sodomites, you Arabs.
Turn not away from it--
therein is wondrous pleasure.
Take some coy lad with kiss-curls
twisting on his temple
and ride as he stands like some gazelle
standing to her mate.
A lad whom all can see girt with sword
and belt not like your whore who has
to go veiled.
Make for smooth-faced boys and do your
very best to mount them, for women are
the mounts of the devils
Now don't go converting based on that. There are also a number of prohibitions, and the jurisprudence is complex. Also, the Arabs are more screwed up sexually than any other people on the planet, and they're as likely to hang a gay as to seduce him.