Ghoul = Human
Furry = Animal
Well, actually the rule of it all is that there are three questions that need to be answered yes for it to be totally fine.
1. Is it capable of speaking?
2. Is it of the sexually appropriate age for its species?
3. Is it intelligent enough to know the meaning of consent and being able to give it?
If all three are yes then it doesn't matter if you're getting your rocks off to a worm or decapitated undead head.
So even if a "furry" is an animal it doesn't matter so long as the three previous questions are answered "yes".
I mean, otherwise we'd have to sneer on those who get attracted to Asari from Mass Effect or even elves as they aren't human, just humanoid.
Don't be a speciest, man.
Now then, time for me to go schluck to Donald Duck.
Has fish ever pm'd you? Because my god...
Nope, but I PM'd you with some delicious pics.
[edit]
Also, I find it hard to get aroused by anthro stuff because I just imagine how (for example) a dog's fur feels like and then imagining that all over the body of the one I'm touching? It makes me too uncomfortable.
Now dragon girls on the other hand...