FURVERT!

accessory anthro avian balls big_penis bird black_body black_feathers black_fur bodily_fluids darkner deltarune feathers flexing fur genital_fluids genitals hands_behind_head hi_res humanoid_genitalia humanoid_penis low-angle_view male musclegut muscular muscular_male necktie nipples non-mammal_nipples pecs penis perbirds precum precum_string slightly_chubby solo swatchling undertale_(series)