There are no 'norms' other than, don't engage in self-harm, don't be stupid and go with people who will ruin you, don't engage in drugs, and don't rape children or animals. Also, don't have sex with other races as this is ultimately ruinous. Your sex life is otherwise your own business.
Do a Working Freeing your soul from Sexual suppression of any sort that is an outcome of enemy programming, then you won't even think of this question.
You won't doubt anything anymore after the spiritual working. Just Mere words and anwers will hardly help in perfect understanding of Sexual knowledge. Spiritual Energy will solve the problem.
It is however not quite socially accepted everywhere though, especially in Islamic countries.
And even if it's not seen as a "sin" in other countries like in the west, there is still much taboo surrounding it.
I would personally consider myself to be bisexual, but it's one thing admitting this on a forum and something else to IRL friends etc.
I think many people of both genders are bisexual at least in some sense, but that most of them live the hetero life while hiding away their bisexual nature and sometimes even try to deny it totally. I'm past that myself though and find it interesting that the taboo is so strong with this. One does not lose their attraction for women just because attraction for men also exists. That is an important thing to take in I think.
Sexuality is overall an interesting subject for that matter. My high school teacher in psychology claimed for certain that all people are born bisexual. I myself think that even if that might be true in some sense, there still might be some kind of genetic factor to is also. My own bisexuality might reflect some feminine aspect of me which might be more pronounced in myself than in other men. That I have no problem with either.