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2d_animation 3:2 anal anal_penetration animated animated_gif anthro backsack balls biceps butt dinosaur dromaeosaurid duo erection flash_conversion genitals hadrosaurid jasonafex knot knotted_penis licking looking_back loop male male/male male_penetrated male_penetrating male_penetrating_male motion_tweening muscular muscular_anthro muscular_male nekrall non-canine_knot non-mammal_balls ornithischian ornithopod parasaurolophus patto penetration penile penile_penetration penis penis_in_ass pink_body prehistoric_species reptile saurischian scalie sex short_playtime tail text theropod tongue tongue_out velociraptor vergence