abs animal_genitalia animal_penis anthro anthro_on_anthro balls biceps big_penis bovid bovine cattle circumcised comparing comparing_penis e621 elephant elephantid equid equine equine_genitalia equine_penis flaccid genitals group horn horse humanoid_genitalia humanoid_penis larger_male male male/male mammal monochrome muscular pecs penis proboscidean proboscis_(anatomy) size_difference smaller_male sudonym thick_penis trunk_(anatomy) tusks

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