They don't. Go and reread what I wrote, then come back here and quote the part of my comment where I said that.

And I again refer you back to what I previously wrote, your priorities change as you age. Mine did. I'm far more likely to have sex with a partner who's company I enjoy than someone who's company I don't enjoy. That aside, I didn't say you're gonna just start solely having sex with only people you have good company with. I didn't even say that you'd stop trying to have sex with people you were physically attracted to. I said your standards will change. Which insinuated that maybe you might not have slept with someone when you were 18yo cos they didn't meet your criteria of being attractive back then, but you might now cos your standards have changed.