Takayama may have already become a being belonging to a higher dimension than humanity, and could loosely be referred to as something like a god or a devil depending on how things go from here. Barbara's situation makes me think that a lot of the girls are mistaking a species related "attraction" to something close to the ultimate form of the birdman so far as a romantic attraction because they weren't already romantically attracted to someone, and can't feel a difference between those two things. Something along the lines of him being the alpha of the pack, but it's not like he'd take every female in the species for himself at the end of the day? He's probably not even interested in that at all to begin with.