Broken Water Heater?

Last week I started noticing that the hot water wasn't get as hot as it usually gets.  It was warm, but not hot.  I mentioned it to my husband and he didn't say anything.  He acted like he didn't even notice.  One day I was shivering when I came out of the shower.  It was just too cold!  So I told my husband again.  Again, he acted like he didn't notice anything different about the hot water.  But he did have a solution for my problem.  He suggested that I should turn up the hot water on the faucet.  Brilliant!  Obviously I had already tried that, and after another luke warm shower I went back to my husband in exasperation and said, "Do you want to take a look at the hot water heater or should I call someone to come in and fix it?"
He said, "It's not broken.  I just turned the temperature down."
WHAT?!
Why hadn't he mentioned this to me before??
Did he really think I wouldn't notice?
Did he think that I would get used to taking cold showers??  Maybe he should have tried this trick in the summer, but it's freezing now!
He begrudgingly went into the garage and fixed the hot water heater.
Hot showers have one again been restored in the Cookie household.