This answer made me wonder, how would our society be different if humans had tails?
Of course, tails come in all sorts and sizes, so let's say we had a monkey type tail. One you could wrap around a branch and hang on. About as hairy as an arm.
I can imagine all sorts of minor adjustments, like having to allow for a tail in our clothes. But even that poses the question whether we'd want to show our tail, or hide it.
But would toilets look even remotely like they do now, if you could wrap your tail around a rail for balance? Would we sleep in beds, or in hammocks?
What effect would those changes, combined, have on our society?