Steve and Jack work at the local auto parts and repair shop. Sometimes, they get a little horny... and need their engines revved!
They start slowly with an oil check. Jack takes that sweet dipstick as far as his throat will let it. Steve gets in on the action with a pretty big dipstick tasting of his own.
Time to change gears, and Jack bends over for a little motoring! A little oil change, and Jack rams his buddy from behind like a piston! When all is said and done, this isn't an internal combustion, and Jack leaves a sticky mess just outside of Steve's gas tank.