FURVERT!

1:1 anthro anthro_penetrating anthro_penetrating_human balls biped bodily_fluids cum cum_string duo equid equine erection fellatio female female_on_anthro female_penetrated genital_fluids genitals greyscale holding_penis horse human human_on_anthro human_penetrated interspecies line_art male male/female male_on_human male_penetrating male_penetrating_female mammal monochrome muscular oral oral_penetration penetration penile penis sex simple_background sketch sketch_page tris unknown_artist white_background