Xaq27, I'm pretty sure the brains/eyes line is mostly just there for the funny but I think in the song Bob the zombie is trying (rather unsuccessfully) to assure Tom that they are not bloodthirsty fiends but reasonable zombiefolk. Sure, they hunger incessantly for brains but they're not monsters who run around eating people's eyeballs. Which for some reason (perhaps the fact that he's incapable of higher brain functions do to decomposition) he sees eating someone's eyes as a much greater offense that simply devouring their brains.
Xaq27, I'm pretty sure the brains/eyes line is mostly just there for the funny but I think in the song Bob the zombie is trying (rather unsuccessfully) to assure Tom that they are not bloodthirsty fiends but reasonable zombiefolk. Sure, they hunger incessantly for brains but they're not monsters who run around eating people's eyeballs. Which for some reason (perhaps the fact that he's incapable of higher brain functions do to decomposition) he sees eating someone's eyes as a much greater offense that simply devouring their brains.