FURVERT!

all_fours animal_genitalia animal_penis anthro anus backsack balls big_butt big_penis biped butt canid canine canine_genitalia canine_penis canis fur genitals grey_body grey_fur hi_res hive43 knot looking_at_viewer looking_back looking_back_at_viewer male mammal muscular muscular_anthro muscular_male penis perineum presenting presenting_hindquarters raised_tail smile solo tail white_body white_fur wolf