[vintermann]

I really doubt this thing that experience with multiple people makes you better at sex. The physical aspects of sex are dead simple, and not that exciting.

Everyone but the exceptionally oblivious, will know their own body better than any partner could hope to. Better sex (beyond a low point) comes not from some esoteric physical technique, but from what goes on in people's heads, "horniness" in the article's terminology.

More likely you get worse at it as you age, and all the clever things "experience" can come up with to make things spicier in the brain-part of sex, only partially makes up for not being (as) young and not exploring the map for the first time.