Bob is actually a fairly interesting portrayal of just what a guy raised by aliens would turn out as. I mean, you hear about people being raised by wolves and monkeys and so forth, but at least those are mammals who share roughly the same behaviors as we do - they're warm-blooded, they give birth to their young, they eat stuff we eat (raw, mind you, but still), etc. Bob, on the other hand, has largely been raised by telepathic alien jellyfish - not only aren't they mammals, they aren't even vertebrates. He's lucky that he doesn't get turned on by strawberry jam, or jell-o. (Or maybe he does, I wouldn't know. Anyway, the guy has problems.)