One morning as I was brushing my teeth, I looked up in the bathroom mirror. What I saw was that I was using my husband's toothbrush. His is blue and mine is green; no reason whatsoever for the confusion.
I blamed it on my early morning rising and convinced myself that was the cause. I went out shopping that afternoon and bought new green and blue toothbrushes for the two of us.
Three days later I did the same thing all over again.
I now have a large stock of green and blue toothbrushes (just in case.)
And this is our little secret because I never told him about it.