Both of your theories are wrong, Zerox, I actually have the head of a Bananana*.
*Bananana [Buh-nah-nuh-na] n.; A delicious fruit that looks nothing like it's closely name-related relitave, a Banana, it looks like a tomato that's green, with spikes all around, this is it's shell, if ripe, it's extremely sweet, juicy, and tart flavor on the inside. Also see: BanananaHead.