oh my YES!!!! I also identify as straight but have had multiple encounters with women while up - not even because I was necessarily 100% sexually attracted, but simply for the thrill of it. I always 'decide' I'm bisexual and I even have a very particular type. My last relationship ended with a 4-some gone awry...

I am also totally convinced I don't believe in monogamy during these periods, that I am polyamorous and want both my partner and I to have other partners...luckily I keep this to myself until it passes...not that I would be opposed but I don't think I could handle the inevitable turmoil right now