What turns a person into being bi?

Having the most beautiful feminine sissy maid clean my house and all it cost me was to spank and dominate her . I say her as to me she was . Just with a lollipop . I came buckets in her and did things to her that would blow your mind . Yet when she was male . I had no interest in him .

As a child I had more or less equal numbers of friends of each gender. I didn't start looking for a relationship until a few years after I had gone through puberty. Naturally it was easier to approach people who were already friends than trying to develop a relationship with a complete stranger. So no love at first sight, I think I have a preference for the more androgynous types of either gender, I am not really attracted to people who have strong gender based attributes. No alpha males or super models, once in a relationship I am only attracted to my current partner and do not find other people of either gender attractive. So perhaps I was 100% hetero when I was in relationship with a girl and 100% gay when I was in a relationship with a boy. My hetero relationships have all been longer term than the gay ones, so perhaps I lean more towards hetero. My wife of 40 years passed away a few years ago and I am only just beginning to be attracted to other people, I haven't noticed a strong preference for either gender so far, but I can only relate to people around my own age (73), so perhaps I am still bi despite not having been in a same sex relationship for about 50 years. There are very few androgynous types in my age group, so I am not strongly attracted to any of my current circle of friends. So to address the original question I don't think anything turned me bi, that was just the way I developed, entering into an active relationship however seems to turn me from bi to either hetero or homo.