This will depend on the context. For example, was it flirtatious, during lunch or just out of the blue.
If it was in a flirtatious context, he is most likely asking you if you want to see his penis (often termed a banana due to its resemblance of the shape), and if you want to engage in sexual activities with him.
During lunch, it would be safe to assume he is simply offering you a banana for food, and not in the sexual context.
If you know the boy well, you should know what he means by it. Look at his body language and facial expressions which gives a lot away.
It means your a dog...
that they like you and want you to say i like you to back
It means they really dislike the boy and don't want to go out with him...
It May Be That He Is Getting Mocked By His Friends Or He May Want To Go Out With You Either Way Be Honest But Don't Be To MEAN!
He is worried about you.
They like you
Red
he has dry skin.
It means he likes you.
sex!!
it probably means he likes you lol
It means she is catching the bus to see a boy.