I found out this morning that my sweet grandmother has Alzheimer's. She woke up and asked: 1) Who I was, 2) Why was I sleeping next to her, and 3) Why her asshole hurt.
Wow, it's disgusting to think about sleeping with your own grandmother. Is there a reason why you would say that?
Just joking bro. I love my grandma and she has Alzheimer's
While it's good that you love your grandmother it is wrong that you used her as the subject of a joke involving rape. It's also not right to joke about rape since it trivializes the hurt others experience when they are sexually assaulted. I would try to refrain from making such dark jokes in the future and instead focus my efforts in supporting my grandmother with the medical care she receives for her Alzheimer's.