So the woman was overhearing the two Italians on the bus. "First comm-a Em" "Then I come" "Then two esses coming together" "Then I come again" "Two esses come together again" "Then I come" "Then pee twice" "Finally, I come one last time!" She gets up in a rage, and shouts at them "You guys are perverted! Why don't you go somewhere else to talk about your sexual fantasies?" The Italian, astonished, asks "What fantasies? I'ma trying to teach him to spell 'Mississippi'!"