A Conversation About Cousins

This is what I overheard:

WILL:  (while looking at the cat):  That looks just like how Drew does when he does his arm farts.

OLIVIA:  Drew is the grossest of all of our cousins.

W (with EXTREME admiration in his voice):  I know!  He is so good at arm farts.

O:  He's the only cousin who can do them.

W:  He must have done a lot of exercise to get so good at them.