== Dog sex == 

 The so-called joke does not imply that Obama's mother had sex with a dog. That's a complete misunderstanding. If it were about sex with a dog, it wouldn't be racist. It's about comparing black people with animals. I strongly suggest we replace the sentence about sex with a dog with this from the given soure: According to Travis McAdam, executive director of the Montana Human Rights Network, the joke “basically compares African Americans with animals.”