It seems unjustified to claim that in this case, they are attracted to that person because of their (false) belief that this person lacks a penis, or that they are attracted to that person because of their (false) belief that this person has a vulva, without further data.
That’s certainly true.
It seems unjustified to claim that in this case, they are attracted to that person because of their (false) belief that this person lacks a penis, or that they are attracted to that person because of their (false) belief that this person has a vulva, without further data.