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4:3 abs amon-sydonai anthro armpit_hair balls barely_contained barely_contained_balls barely_contained_penis bodily_fluids body_hair chest_hair clothing dinosaur exercise feet genital_fluids genitals hair happy_trail hi_res male muscular muscular_anthro muscular_male pecs penis_through_underwear precum precum_through_clothing precum_through_underwear prehistoric_species pubes red_armpit_hair red_hair red_pubes reptile saurischian scalie sharp_teeth solo sweat tagg tail teeth theropod tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex underwear weightlifting wet wet_clothing workout