This question was spawned as the result of a comment on another question
I am sure there are a number of jokes {about rape}! I am not so sure that they are told so commonly to make any difference to the rapists though. Also, there are a number of Jew jokes--possibly many more than rape jokes. Does this make anti-Semites feel that it is socially accepted to be racist or even that "everybody is a racist"?
Is there any evidence that these sorts of displays of at least quasi-acceptance of anti-social behaviors leads perpetrators to believe that their acts are acceptable and common?