For some information, it'd be better no to know.
I have a coworker who doesn't wash hands after using restroom. Once I find out, I can't help thinking about her hands every time I see her. :(
If we don't have control over others' personal hygiene, the best defence for ourselves is to wash often and keep hands off our faces.
If we don't have control over others' personal hygiene, the best defence for ourselves is to wash often and keep hands off our faces.