How old are you? How much is biological? how much is social construct?
First, memories form with whoever. When we talk about sexuality, we're speaking about birthing your children or others children.
15% of the population have a weak or inverted biological response with hetrosexuality. By nature, up to 15% are not biologically compelled to life partner for the sake of producing their own offspring.
Oxytocin is 100% sexual. In that manner, all people could be gay. Yet, oxytocin is produced by other activities too. So, self control starts when self control starts. I don't date below 25, because of the respect that comes with certain self control.