You see, its funny because it is about a woman getting savagely beaten and then sexually assaulted. Hilarious. Although, you can really just count this as the mistake of a young man. McCain was only 50 when he told the joke (4 years older than Obama is now). Kids will be kids.
Did you hear the one about the woman who is attacked on the street by a gorilla, beaten senseless, raped repeatedly and left to die? When she finally regains consciousness and tries to speak, her doctor leans over to hear her sigh contently and to feebly ask, “Where is that marvelous ape?”