Whoever said it earlier had it dead on--it is far easier to do romantic shenanigans in text than it is in person. Our group is somewhere around 60-40 male/female depending on who shows up, but almost always there is at least one girl(I do play lots!), plus 3 others.
However, since we're all middle-aged, and lifestyles set, it is just awkward to do face to face. I've found it's much easier to flirt with the GM pc's, and even the guys handle flirting with the male GM's face chicka better than they do flirting with, say, the new mom cuddling her baby.
That said, sure, it has a place in the game. Our physad has a half-serious, half-not, affair with one of his contacts, and we joke about what her current loyalty is before each game.
It did feel odd hearing folks wouldn't want female players because of it though. We(our group, anyway) spend far more time hashing out legwork, and plotting intricate methods to get the run done, and what we're making for potluck next game, than we ever ever ever do regarding romance. Maybe because no ones 'looking' for a new bf, and except for a married couple, no one's dating each other?