The way to a woman's heart isn't romance: it's orgasms.
In one of my favorite scenes from American Pie, Kevin solicits relationship advice from the impossibly chill and all-knowing love guru, Jessica. He needs help with his girlfriend Vicky, who's pissed because Kevin won't say the "L" word. Jessica gives it to him straight: "You've got to either give her the big 'L' or the big 'O,'" she says. Translated, Jessica's telling Kevin to do one of only two things: either say "I love you" -- or give Vicky a great, toe-curling orgasm.
I found out just how perfect Jessica's advice was during my freshman year in college and had my first orgasm with another human being. The boy I'd bedded was instantly my new obsession. Turns out my experience wasn't unusual -- orgasms make women fall in love by rendering them incapable of coherent, rational thought. But why?