Shampoo and Ketchup

I had a great conversation today with a client about the fact that his wife thinks that he uses too much shampoo and conditioner.  She went on to say that it's just like ketchup.  He thinks he needs to put a huge pile of ketchup on his plate, and then only uses a small amount of it on his food and throws the rest away.  This guy has pretty short hair, so the reality is, he needs about a pea sized amount of shampoo and conditioner.  I gave him specific instructions on how much to use, and sent him home with his own bottles so his wife can be assured that he won't waste any of hers.  Needless to say, he promises to use less ketchup in the future!