Rule 34 Dev - abs anthro balls biceps big_penis circumcised circumcision_scar duo erection eyewear flaccid fur genital_scar genitals glasses hand_holding hand_on_shoulder horn humanoid_genitalia humanoid_penis interspecies larger_male male male/male markings muscular nipples nude pecs penis pose scar side_view size_difference smaller_male spots standing tail thick_penis vein sudonym enzi cheetah felid feline mammal rhinoceros monochrome sketch|1176662620