In this uninhibited display, the dogs' natural desires take center stage. The scent of pheromones fills the air as the pack grinds and humps, their bodies slick with sweat and saliva. The females, their heat in full bloom, arch their backs and raise their hindquarters, inviting the males to mount them. The males, their cocks hard and ready, obligingly plunge in, the sound of their bodies slapping together echoing through the room.