I eavesdropped on this convo, reprinted here verbatim:
Isaac's Friend: What is that?
Isaac: It's a coconut bra.
Friend: A coconut bra?
Isaac: Yeah, girls put it on their boobs. My sister Paige made it.
Friend: Paige has boobs?
Isaac: Pretend boobs. It's not a real bra. Real bras are made out of silk, not coconuts.
Friend: I found a coconut on the beach once. Coconuts have milk in them.
Isaac: Boobs have milk in them too.