Rule 34 Dev - anthro balls barefoot bed big_penis biped black_body black_fur black_nose bodily_fluids breath cuff_(restraint) ear_piercing erection feet foreskin fur furniture genital_fluids genitals humanoid_genitalia humanoid_penis looking_at_viewer lying male markings masturbation muscular muscular_anthro muscular_male nipples nude on_back open_mouth panting paws penile penile_masturbation penis piercing pillow precum restraints retracted_foreskin shackles simple_background sitting solo spread_legs spreading tongue tongue_out white_background anakuro canid canine canis domestic_dog mammal 2013 digital_media_(artwork) sketch|1404348855