Sometimes I wonder if I am brushing my teeth the wrong way or maybe hubby is brushing his just a bit too hard?!

We always start out with the same brand new toothbrushes at the same time yet as days go by, I noticed his look different than mine. Usually by the end of one or two months, his toothbrush would be in the form of explosive bristles while mine look pretty much the same as the day I opened it. Am I brushing my teeth too light or not clean enough? Or is he brushing them too hard? Things that make one go hmmm...