Here is a comic strip I made, you probably can’t read it, sadly, but what happens is Bobby sucks his thumb, his mom tells him to go wash his hands, Bobby spreads the germs on his hand to the light switch in the bathroom, washes his hands, then touches the light switch again, so he basically washed his hands for nothing.
Take note everyone! Stop touching your anus!
Omi! Did you mean to type that?