Chief Operating Officer Puns

I was talking to my girlfriend about the sorority structure with President and all the various vice presidents.

She mentioned that another sorority uses a corporate structure..

Gf: "Rather than president they have a CEO and instead of a vice president of finance they have a CFO."

Me: "So do they have a Chief Operating Officer?"

Gf: "Yeah, I think so."

Me: "Oh, that's coo."

Snickered a bit and she just gave me that "you're kidding look."