In a perfect world, your boyfriend/husband/fiancé/hookup would have the Goldilocks of penises: not too big and not too small—juuuust right for.
Considering that the vagina is designed to stretch so much that another human can pass through it, you'd think it could easily fit any size erect penis. At rest, the vaginal canal measures 3.7 inches long, on average. But when you're sexually aroused, it elongates, lubricates, and.
An average penis in its resting state is roughly 9cm and when erect between 12& 14cm. What if your partner is absolutely huge?!.