Rule 34 Dev - abs animal_genitalia anthro balls biceps big_muscles biped circumcised circumcision_scar flaccid genital_scar genitals horn humanoid_genitalia humanoid_penis male muscular muscular_anthro muscular_male nipples nude pecs penis pose presenting scar sheath solo standing swimming_pool thick_penis vein water wet sudonym mammal rhinoceros 1997 monochrome sketch|1786787765