Not actually a fear despite its name.
It's really just
people being a-holes who can't stand
people who are different than them.
Something that only occurs in one species, while the thing homophobes are 'afraid' of is common in 4,000 species.
Bob: I went and asked Jacob out.
Sara: Really!? What did he say?
Bob: ...He said- fuck off... you fucking f*g.
Sara: Goddamn homophobia! -I'm sorry
Bob.