I agree with Cassandra. I think it is so funny to hear Mrs. Johnson try to explain what is wrong with the kids! It sounds so lame and yet, she is very right. She just can't put her finger on what it actually is.
"I think there is something wrong with David, Maggie, I really do. I think he is possessed by the spirit of a very tall, yet obscure ancestor that noone up to now has ever heard of. AND, you should have seen the lecherous expression he had when looking at Amy, I've never SEEN the like!" (Yes, Mrs. Johnson, we can believe THAT. Ahem.)