FURVERT!

2018 anthro anus back_muscles balls biped bite_mark black_hair bodily_fluids brown_body brown_eyes brown_skin butt canid canine canis castbound countershading domestic_dog gaping gaping_anus genitals hair hi_res looking_back male mammal nude perineum presenting presenting_hindquarters russell_(castbound)saliva simple_background smile solo spread_legs spreading