Bisexuality is a very common experience with very common feelings. When we are born, we are naturally able to accept love from males and females, but when we get older, we have a sexual preference. Sexually most people today have some limited experience with bisexual sex, usually as a sexual adventure. Most homosexuals have a period in which they try really hard to be heterosexual. There are two distinct kinds of bisexuals.
Parallel bisexuals can have sex with males or females at any time.
Serial bisexuals can have a relationship with a man and then a woman and then a man and are the most common. Just because you have experimented with sex with the same sex doesn't make you bisexual. Many porn stars engage in bisexual behavior but they do it for the money. Then they go home to their heterosexual relationships. Most animals show bisexual behavior but sometimes the sexual behavior isn't really about sex.