It's a perfectly legitimate question of economics: how to allocate your consumption of a finite non-durable good over an infinite period of time.
And Glen Whitman means "infinite," too:
If you were a Muslim, and you died and went to the Muslim heaven, how would you space out your enjoyment of the 72 virgins? Suppose that you actually find virginity desirable, and suppose that the virgins' maidenheads are not magically restored periodically. If the afterlife has infinite duration, then no matter how long you wait to deflower your 72nd virgin, you’ll still be looking at an infinitely long virgin-less future thereafter.
I could be wrong, but I would guess that after you deflowered them, you would get to play with them too. They wouldn't still be virgins, but probably they would still be hotties.