Sex in the car.

Well all I'm aware of is that a friend of mine received oral sex whilst drag racing a Civic. Reason I know is because with one hand on the wheel, his other hand was holding his camera-phone, constantly switching between filming the girl's head and his RPM dial.
 
in the backseat of a Corolla is a little cramped. Unless you're sitting down and have her ride you (rather than lay down and do it missionary).

like lizard said...use your imagination...