There's masturbation. Men who go without ejaculation for a while can have spontaneous nocturnal emission. Men locked up in prison for long duration will even turn to other men.
Regarding men in a marriage who don't get sex from their wives for an extended period, it is invalid to assume that they are not getting their sexual release in some other way.
What seems to be a fundamental difference between men and women is that a man does not necessarily need to have an emotional attachment to a woman, or even particularly like her, in order to have satisfying sex with her.
I was referring to when a woman cannot due to pregnancy or a physical reason.
Which is why a woman might reasonably conclude, if her experience supported such a conclusion, that sex has nothing to do with love, and nothing to do with her. It's just him and his prostate.
Fortunately, my experience has not led to this conclusion, but reading threads where people discuss their personal values (as it were) can be like reading "People" magazine: "Eeew, I'm glad I don't know those people!"