No, not all women are prostitutes. Become worthy of sex? Lady, are you mental? What if he loses his job, becomes sick, becomes disabled? You’ll drop him? In that case, it should go both ways. If you are pregnant, breastfeeding, unwell, have a bad hair day, he should feel free to sleep with other women?
What a pathetic, impoverished reality such people inhabit. She must have never felt any actual physical desire or loved anybody.