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abs anthro balls biceps big_muscles big_penis circumcised clenched_teeth duo enzi erection eyewear fur genitals glasses grin hair horn humanoid_genitalia humanoid_penis humor interspecies larger_male legs_up male male/male mammal monochrome muscular muscular_male nipples nude ouch pecs penis pose presenting rhinoceros rodent sciurid simple_background size_difference sketch smaller_male smile standing sudonym swinging teeth thick_penis tree_squirrel