dual purpose

This conversation took place at work awhile ago, but I'd forgotten about it until tonight, when I heard an infant screaming somewhere downstairs, around dinnertime.

me:	Dude, I just saw a woman in the hallway feeding her baby.
coworker:	With her boobs??
me:	Duh, I wouldn't have mentioned it if she'd been using a bottle.
coworker:	It's so funny that boobs are like, for food, too.
me:	Um...yeah.