@Afos22 They proved animals also agree that no means no, not that homophobia exists in dogs. Furthermore @KatawaGrey hasn’t actually brought any evidence to the table, just conjectures that deviate entirely from the meaning of the word homophobia the moment we start talking about animals.
Whether you take the literalist point of view and define homophobia as the irrational fear of homosexual individuals or you agree with the broader, more common definition, as “haterd towards homosexuals”, neither are proven by the fact that some dogs discouraged another male’s sexual interest in them. Homophobia is a behaviour that is directed towards an entire group, regardless of the actions of the individual, what @JilltheTooth described is homophobic in the same sense in which a woman who doesn’t want to have sex with you is heterophobic.
Not wanting a particular partner doesn’t imply fearing said partner because of its sexual preference rather than its behaviour towards you, nor does it imply hating it and its whole cathegory for the same reason.
As for @KatawaGrey‘s point on homophobia, i have only one thing to say: on average, men react better to lesbian porn than to heterosexual porn, sexual excitement wise. By contrast, homophobic men tend to have a greater sexual reaction to male-on-male porn than non-homophobic ones. As reported by this study of which i can’t find a complete copy on the web, though i read excerpts here and there.
So, honestly, i doubt the point is fear of being raped. I fear rape as much as the next person (the same way i fear being hit by a car, falling down a manhole, etcetera), and i would say that hardly qualifies as a phobia, read an irrational fear.
Furthermore this hardly seems as a stepping stone for hating/fearing the whole homosexual cathegory without stepping full on into logical fallacy and, hence, irrationality, territory.
Slice it any way you want: if you fear/hate an entire category because of something you might potentially be victim of from some of the individuals in that category that’s not rational, that’s fallacy ridden reasoning from beginning to end. And it would be fallacy ridden even if you actually were a victim, even though it would be a little more understandable.
It is rational to fear rape, it is not rational to fear every person that could potentially want to rape you. If it were, women would go around with high voltage chastity belts and males would wear cast iron underpants, oddly enough they don’t.