They're disposable. You can sow your proverbial oats and gain experience without worrying about actually hurting someone by using them for sex, notoriety, money, amusement, whatever because they didn't value you from the start either.

Neither party is being done wrong in a way that they are not also doing, except when one of the parties is actually being authentic and honest in intent and the other is not.

But that's why. Men who treat women as disposable to notch their belts in competition with other men by definition make themselves disposable and a commodity too. And vice versa.

If you don't treat relationships with integrity, you shouldn't expect to get it.