@RetroFM You are mistaken. Flesh hurts when torn apart.
That said, all hymens have one or more premade holes to allow for ovulation and such, and some girls have one huge hole in their hymen from the get-go so the it doesn't really tear at all even when it has a dick rammed through it.
Also, even if you aren't a virgin it generally hurts quite a bit when you're penetrated dry.