I'm a straight guy who is not interested in interacting with animals in a sexual way, so naturally i'm not that interested in chatting to guys about their zoo exploits. i'm a sucker for 'i'm a horny 19 yo female looking to chat to horny dudes' etc. etc.
i've chatted to several; some i've suspected of being fake, some are genuine, and one or two the the jury's still out on. i can't really see what a guy impersonating a female gets out of it, probably because i've never felt the need to do something like that myself.
if i identified someone as a 100% faker here, i'd out them in an instant.