After you go for a long run or finish an exciting game of ice hockey, ask your girlfriend to take off all of her clothes and lay on her back. proceed to take off your own clothes and strattle her stomach. At that point lift yourself off of her just enough so that your long sweaty greasy sack is the only thing touching her and proceed to drag it up along her chest and over her face resulting in her getting snailed.
Man what a great game! I know, I'm so greasy right now i'm going to go home and give Lucy a wickedly slimy snailer.