The news is filled with stories about inappropriate touching by politicians. But touch by politicians was long important in the US, and Abraham Lincoln's handshake helped engage and guide the nation.
Handshakes may be polite, but they're also a sure fire way to transfer lots of bacteria from one hand to another.
Beware the 'clasp and yank'.
After a handshake, we learned this week that we sniff our hands. But why? Hand smells are not all that interesting in themselves. This points to possibilities that you might not want to hear.