guy equation
A simple algebra-type (A, B, C, and D) formula that illustrates the primary brain activity of a typical male when viewing members of the opposite gender.
She: Why do you want to know what size bra I wear?
He: Oh, just 'cause I'm a guy, and so I follow the guy equation --- A. We're guys. B. Guys love boobs. C. Double-D.
He: Oh, just 'cause I'm a guy, and so I follow the guy equation --- A. We're guys. B. Guys love boobs. C. Double-D.