Wow, the second opportunity in one eve to post my fave quote/prayer from my favorite Saint, Augustine.
"Lord, give me chastity and temperance, but not now." :-)
I was abstinent when I was in high school, though not by choice!
Well, I'd say they put the carriage before the horse and mixed the cause and the effect: "geeky" students tend to be less popular, less attractive, [thus suffering in personal life] - but more successful academically [that's what makes them "geeky"]. Thus it may be not abstinence that contributes to academic success, but rather academic success that contributes to abstinence...