It does not add up.

Maybe porn helps release some of that frustration and therefore effort is less? Maybe the price of women and relationships is too high anyway? Maybe the sexual impulse is not as strong as assumed and it is exaggerated by men just to look more masculine, or maybe the most sexual men are the only ones that are visible?

Regardless, if sex was so paramount for men, they would by far the sex giving the most attention to looks and fashion and so on, but it seems women are winning on that.