There a videos of Chimpanzees touching and f****** child Chimps. Also I’ve seen an adult dog mount a puppy. He was pushed away before he penetrated but he wanted to and would have. Also a small boy around 3yo playing naked got mounted and knotted by a male dog. When the mother & neighbour started screaming the dog ran off down the street dragging the boy behind him until the knot ripped his r***** out. There were news stories about it around 10 years ago.