Much of the body of a brush-head is shielded by chitinous plates. The head has a mouth cone equipped with stylets and numerous scalids A Photographic Tour Of Earth's Most Bizarre And Beautiful Creatures
you really think about it, kissing is just crudely mashing your skull against someone else’s skull, but there’s soft tissue in the way, and this feels nice, I guess? It definitely looks unusual in X-ray form. Humans are weird.