FURVERT!

anthro anus backsack balls big_balls big_butt big_penis black_hair bodily_fluids bound brown_body brown_fur butt darkened_anus darkened_balls darkened_genitalia darkened_penis dripping equid equine erection foreskin fur genital_fluids genitals hair half-closed_eyes hi_res hooves horse hotdogsauau male mammal muscle_tone muscular muscular_anthro muscular_male narrowed_eyes nipples nude pecs penis perineum precum precum_drip precum_string presenting presenting_anus presenting_balls presenting_hindquarters presenting_penis puffy_anus raised_tail simple_background solo tail tail_tied