The bottom one might be dirtier, with kids specifically wanting to “soil” it because that is “so funny”. And the group that does wash their hands don’t want to touch “the dirty one”.
I would argue that the bottom would be dirtier, not because of kids reflex to be contrarian, but because human nature pushes people to prioritize themselves even at the cost of society. They may not wash THEIR hands, but they are not going to touch other dirty peoples handle.
The bottom one might be dirtier, with kids specifically wanting to “soil” it because that is “so funny”. And the group that does wash their hands don’t want to touch “the dirty one”.
I’d put good money on your take.
I would argue that the bottom would be dirtier, not because of kids reflex to be contrarian, but because human nature pushes people to prioritize themselves even at the cost of society. They may not wash THEIR hands, but they are not going to touch other dirty peoples handle.