While there is a kernel of truth about the whole gay men stereotype I can't say I ever met a girl who wouldn't date or dumped a guy if she learned he had a bi/gay phase. The only thing that comes close was the guy who got dumped cause he cheated on his gf with her gay best friend.

Hell I had a girl actually try to hook up with me because she heard a rumor I did something with a twink (I hadn't) and wanted set up some weird love triangle with her bi twink friend. I backed away from that one cause it was clear the guy crushed bad for her and there was no way that relationship was going to end with everyone walking away content.