was the kid even ralph's? Remember janice (and later melfi) tell tony that ralph can't have normal sex, he has to do that wierd shit and never technically has sex.
I always figured this meant that the kid wasn't ralph's and he was pissed that she was sleeping with someone else and trying to pawn the guy's kid off on him.
i think it could have gone either way because on one hand what you said above is true and he also says at one point that it wasn't his kid. but on the other hand there's that scene where him and a cop are spit roasting tracey therefore proving that he is somewhat capable of getting a boner and bangin away
