This method has been tested through science. Me and my friends Marn and Himrn play all the time. Take a book of Madlibs, and fill in every blank with the word "boner" or "boners" (where appropriate) and then get ready to hurt - from laughter.
"MY DREAM GIRL"
The girl of my dreams has boner boner hair scented like boners. Her eyes are like two boner pools of boner. And her lips remind me of boner boners. Her skin is as smooth and loverly as a boner boner, and she has a figure like Boner. When she enters a room, people always stare at her and say, "Boner! What a boner woman!" Her sense of humor is always boner, and people marvel at her boner vocabulary. In my dreams I see her wearing a boner dress and a diamond boner in her hair. I would gladly give up all my boners for one evening with this boner female. Her name is Boner.
And then Marn laughed so hard he got a boner.
Madliboners also good for parties.