As do many people, I have a weight scale in my bathroom. My habit is to weigh myself while not wearing clothing. My weight has been fairly stable for some time. Yesterday, I popped onto the scale and discovered that I was more than a bit over my normal number.
I regarded the scale somewhat in disbelief. Only then did I notice I was still holding my toothbrush in hand.
Apparently, I have a pretty heavy toothbrush.