it depends...there are ex's and there are EX's...we all have some ex's that we will just never get over completely, and those, HELL NO, but the others, the ones that aren't that big a deal and from which both parties are ok, maaaaayyyyyybbbeeeeee...i am not one for sloppy seconds, but sadly, like some of you have already pointed out, sometimes you meet people through friends--perhaps even because they dated your friends. i can say i would not want to, in theory, date someone my friend dated, but i can't say it would NEVER, absolutely NEVER happen--who knows?