Funny Dirty Joke

A white guy woke up in a cell with an Asian man and a black man. None of them had any idea what was going on. All of a sudden a mysterious man appears in front of them and says, "If all of your dick lengths combined can reach exactly 1 foot, I'll let you all go. If not, I'll kill you all" All 3 men pulled down their pants and put their dicks together, the white guy had 4 inches, the black guy had 6 inches and the Asian guy had 2 inches. The man then let them go. As they were leaving the cell, the white guy said, "You guys are lucky I'm white." The black said "No way! You guys are lucky I'm black!" And then the Asian guy yelled "You guys are lucky I had a boner!"