Eating Corn Flakes

A guy was chatting with a girl on Whatsapp...

GUY: So what are you doing now?

GIRL: I'm on my bed.

GUY: Doing what?

GIRL: Eating corn flakes.

GUY: What would you do if I was on the bed with you?

GIRL: Eat my corn flakes

GUY: No, I mean if there is no corn flakes and I'm on the bed with you all alone.

GIRL: I would go out and buy corn flakes.