You know that ugly, terrible, totally annoying and nerve wrecking itch right between your crotch and your butt - and you are on the street or in a meeting. So you can’t whip down your trousers and simply scratch it or ask some other human to do that for you.

Chimps can. Mutually grooming, scratching, caring and cuddling is an important part of their - and many more primates - favorite social event.

I wish we would be more social like that. Our human culture could use some more backslapping, cuddles and scratching …