Rule 34 Dev - 2013 anthro black_dragon claws dragon duo erection feral frottage furry furry_only gay green_eyes grinding holding horn kicks knot looking_down lying male no_humans on_back on_top open_mouth orange_penis penis purple_penis rubbing scalie shiny simple_background spines teeth tieldraggy tongue wings xenothdragon yellow_dragon yellow_eyes|1666812384