You know that old cliché about fighters abstaining from sex before a big match? Well, apparently the OPPOSITE is true for FEMALE brawlers. RONDA ROUSEY is arguably the most dominant woman in mixed martial arts . . . and she just became the UFC's first female competitor. And on sportscaster JIM ROME'S new Showtime series, she revealed that when she has a fight coming up, she becomes a SEX MACHINE. (!!!) Ronda said, quote, "For girls it raises your testosterone, so I try to have as much sex as possible before I fight, actually." Sadly for the rest of us . . . because Ronda is SERIOUSLY hot . . . she isn't just slinging it around for anybody she can find. She said, quote, "Not with, like, everybody . . . I don't, like, put out Craigslist ads or anything, but you know, if I got a steady I'm gonna be like, 'Yo, fight time's coming up.'"