Sharing toothbrush or not

There are three kinds of people in the world:

1. Those who would never, ever share their toothbrush with another person.
2. Those who might grudgingly share their toothbrush with their spouse or child or someone similarly intimate if necessary.
3. Those who would share their toothbrush with almost any other person

I’m in category 3, but I worry I might be the only person on the planet in that category.

Thoughts?