The dating site OK Cupid dips into its database of 3.2 million users to compare gays and straights, debunking a few myths along the way. A few highlights: Gays and straights have the same number of sex partners: six, on average; the same for men, women, gays, and straights.* Gays do not pursue sex with straights. (Only 0.6% of OKC's gay male users have ever searched for straight matches; only 0.1% of its lesbians users have ever done so; only 0.13% of straight users's profile visitors are gay.) Straight people sometimes have gay sex, straight women for more so than straight men. (One in four...