Joke Collection Website - Cold jokes - If a friend tells you a joke, but you don't find it funny at all, how to answer it?

If a friend tells you a joke, but you don't find it funny at all, how to answer it?

If it's not funny, it's not funny ... if it's not funny to her, it's funny to me ... if it's me, I'll tell you one. Laugh when you are funny. If it's not funny, change it ... this little thing bothers me ... the curvature of my mouth is the most beautiful.