all_fours anal anal_knotting animal_genitalia animal_penis anthro anthro_penetrating anthro_penetrating_human anthro_penetrating_male anus backsack ball_tuft balls bodily_fluids butt canine_penis cum cum_from_ass cum_in_ass cum_inside cum_while_penetrated digitigrade doggystyle duo faceless_character faceless_human fluffy fluffy_tail from_behind_position genital_fluids genitals human_on_anthro human_penetrated humanoid_genitalia humanoid_penis interspecies knot knotting looking_back lying male male/male male_on_anthro male_on_human male_penetrated male_penetrating male_penetrating_human male_penetrating_male on_front on_ground on_top orange_body orgasm penetration penis penis_backwards plantigrade rear_view sex simple_background smile spread_legs spreading stripes tuft picometer arcanine canid canine generation_1_pokemon human mammal pokemon_(species)