A sexual intellect
A person who gets their pants around their ankles when someone else is smart or has a big brain.
My math teacher is a sexual intellect. I had to take a break during his lecture because I was getting hard.
She kept solving equations in her head during sex. I asked her if she was having a math test or a brain workout.
He called me a sexual intellect after I calculated his GPA while we were doing the horizontal mambo.