My peers and I broke their cherry as soon as was legally permitted, and some earlier.
Virgins in their 20s was unthinkable in my day.
Anyway, seeing the question elsewhere I jotted down a few thoughts.
The modern world of marriage and dating has never, since the dawn of civilisation, developed social interactions and customary behaviours that have ever matched the innate drives provided to us (men and women) by nature. This mismatch has given us the constant war of the sexes. There have been various strategies provided, mostly, by religions to overcome the difficulties, or more simply to enforce way of living upon us. The last amusing attempt was the "nuclear family" where 1 man, and 1 woman are supposed to live in one domicile to bring up their 2.4 children. This is not natural. In times past less formal arrangements were more common, such as crecheing,, with the men absent on the hunt whilst the women ruled the hearth. Anthropology provides numerous and various examples. But all of them whilst driven by the innate urges to get together, tend to be clouded by a strangling set of endemic assumptions and customs concerning the "right way to live". Non compliance leads to shaming and blaming. In these days of alimony, easy divorce and even palimony, what is there for young men to risk their freedom to get involved? Why risk legal battles? Sexual desire is a loss of power to the opposite sex, and whilst women tend to crave "the bread winner, and sperm factory" the man is risking all for the sake of progeny that the law denies in the primary right to see, when a negative word from the mother can deny access, whilst enforcing payments. But even on a most basic level the rationing of sexual favours by women is usually not worth the effort since these days the libido can be more efficiently and easily controlled by the use of pornography, which is clean, free and quick. Maybe no other explanation is required but the democratisation of pornography?? Boys can then get on with their lives and have fun with or without women. And without the constant pressure of "will she; won't she", boys can girls can just be friends. Why date? Why submit to the emotional control of another person?