Yes it's true!
Sex knocks-out PMS & Smart Girls are better in bed!
Guys, if your girlfriend is bitchy, give her some of your luv-juice! Turns out semen (yep, no condoms) absorbed into the vagina chemically and the result is a calming, pleasure inducing, hormone balancing antidote to female bitchiness.
Studies also show that sex with an intellectual woman is superior to that of party girls and athletic gals.