“Statistically, if you have told a rape joke to a group of more than five people, one of the people you told it to was a rape survivor, possibly of multiple rapes. They will not necessarily disclose this to you; rape apologism is endemic in society and most rape survivors are cautious about whom they tell." Also, there is a good chance too that you are telling that joke to an actual rapist, or someone who intends to rape, making them feel like it's okay to do what they do.
Rape~ Rape is a topic that gets me really heated. I don't get why people blame the victim for being raped. A person should have their own self control to stop from raping someone once that person says no. In no way is it the victim's fault for this horrendous act. No means no.