Biologically bisexual

Biologically bisexual or BB is a sexual preference. People that are BB are bisexual to varying degrees and are only attracted to biological males who identifies as males or Biological females who identify as females.

Guy 1: hey man what do you think about that hot guy over there
Guy 2: i’m sorry I don’t like people like that
Guy 1: what do you mean I thought you were bisexual?
Guy 2: no I am biologically bisexual. I only like biological females that identify as females and biological males Who identify as male.