There was a joke way back when that first babies were often 8 lb preemies. Trends and cultures vary. Marrying young, marrying old, remaining chaste until marriage or engagement, living together, etc.
But like Julia said, it is a private matter, and holding oneself as better than, is wrong.
I would also imagine that remaining a virgin (which definitions of vary wildly) would be easier if masturbation is not considered a sin.