Why do humans kiss? Is it a universal trait? When European explorers travelled the world, they met tribes that didn’t kiss. So is it a learnt response after all? Show more
Discover 11,128,835 listings and 279,775 playable programmes from the BBC
Why do humans kiss? Is it a universal trait? When European explorers travelled the world, they met tribes that didn’t kiss. So is it a learnt response after all? Show more