Quite some years ago researchers at the University of Arizona established that the room in the average American home that had the most fecal matter in it was the kitchen. On average the kitchen sink harbors 1,000 times more germs than a toilet does.
But note that germs (bacteria) are everywhere, on every surface we encounter and in the very air we breath.
There are massively way more bacterial cells in your body than cells that are you.
Indeed we owe our very life to many of the bacteria that live within us.
However, there are some types of bacteria in our gut that don't help us live in any way, and we don't help the bacteria live in any way. Those bacteria have some other unknown reason for staying with us.