abs animal_genitalia animal_penis anthro anus balls blue_eyes butt canine_genitalia canine_penis erection fur genitals grey_body grey_fur hands_behind_head inside knot looking_at_viewer male muscular muscular_anthro muscular_male nipples nude pecs penis plant presenting presenting_anus presenting_hindquarters seductive smile solo spread_legs spreading tree white_body white_fur window bmrwcl canid canine canis mammal wolf hi_res