As someone who has counseled callers on a LGBT hotline, let me point out that a famous study concluded that everyone is bisexual, in theory, as everyone has the POSSIBILITY to have sex with either gender. True, the vast majority of people prefer the opposite sex (and part of the reasons for that are obviously society pressure, religion, etc.) But, under specific IDEAL situations, it is possible that "straight" folks might decide to have a fling (if not an actual ongoing relationship) with someone of the same gender. And people who consider themselves bisexual (attraction to both genders) still prefer one orientation over the other.
Studies have shown that a definite percentage (about 30%) of "straight" men have had at least one same-sex experience. (For
straight women, it is about 60%) And most gay people have had opposite sex experiences, since that is what they have been told they SHOULD be doing. ... tried it, didn't like it, went back to same sex.
Don't think of sexual orientation as a big wall with "Straight" on one side and "Gay" on the other. It is a low fence, and lots of people hop back and forth as they see fit.
A previous response had the right attitude. Don't worry about it. Play safely, and have fun....
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