The 72 virgins don’t speak, don’t urinate, don’t smell, and are generally not much like real, living virgins. The concept is really very odd.
They are perpetually able to “re-flower”. Islam is a smart syncretic religion — it’s origins start in the Nejd with heavy Jewish influence (remember that Medina was a Jewish city) and Arian influences. Mo united the Bedo tribes by putting them together as children of Ishmael (and changing the story of Abraham’s sacrifice to Abraham about to sacrifice Ishmael). This builds unity and a “divine purpose”. Then he adds in ‘loads of free sex after you die for me’ —> psychologically a perfect strategy.