after_masturbation anthro balls biceps big_muscles big_penis black_nose blue_eyes canine chest_tuft cum cum_on_penis cum_string cumshot dripping erection fur grey_eyes grey_fur grin japanese japanese_text kneeling leaking looking_at_viewer male mammal masturbation muscles nipples nude orgasm pecs penis plain_background pose presenting sheath smile solo text thick_penis toned tuft uncut vein white_background white_fur wmustang wolf