You should never tease a fat girl with a lisp. She's probably thick and tired of it.
Do you think it's helpful to make fun of people who have lisps?
I don't care because it's funny.
I don't think it's right to make fun of people who are overweight or people who have lisps. These kinds of jokes can really hurt people's feelings. I think if you talked to some of the people affected by these jokes you'd realize why you should stop making them.