A guy goes into a doctors office with a dead frog on a stick. He goes to the doctor, Doctor, could you inject me with AIDS? Why? said the doctor. Well, the guy goes. When I do it with my girlfriend, shell get it. When she does it with my dad, hell get it. When he does it with my mom, shell get it. And wen the mail man comes and she does it with him, hell get it. But why, said the doctor, and the guy goes, Cause the bitch stepped on my frog!