I read one, thought it was funny.
Literally, I thought in my mind, "that's funny," but in a deadpan sort of way. No emotion.
I read a few more and I found myself smiling.
After a few more I was laughing out loud.
I think it was the consistent, "Hey girl" that kept getting me. Imagine a cross between Andy Sandberg and the guy with the deep voice from Boyz II Men.