I'm going to jokingly compare someone to dr. evil
Can you tell me more about it?
Simply put, this person is a evil person.
Making a type of comparison is understandable. But those type of jokes could have hurtful effects on people.
Who cares about feelings, I'm just joking around.
Like I said, I get that it's a joke. But instead of joking with this person, you should have a conversation with them to see why they act the way they do. It may give you some insight on their personality.