FURVERT!

abs animal_genitalia animal_penis anthro athletic biceps big_penis biped black_nose blue_eyes canid canine canine_genitalia canine_penis canis chest_tuft claws digital_media_(artwork)dog_tags domestic_dog erection flexing fur genitals grey_body grey_fur grin hand_behind_head hi_res knot looking_at_viewer male mammal muscular muscular_anthro nude pawpads paws pecs penis pose presenting red_penis redrusker sheath smile solo standing thick_penis toe_claws tongue tongue_out tuft vein veiny_knot veiny_penis