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1:1 2013 anthro balls bent_over blue_background bra breasts canid canine canis clothing collar domestic_dog duo erection eyes_closed faceless_character faceless_male fellatio female fingering genitals heart_symbol hi_res humanoid_genitalia humanoid_penis leash licking lying male male/female mammal masturbation monochrome mustachemutt nipples nude on_front oral panties penile penis penis_lick sex side_boob simple_background sketch tail tail_motion tailwag tongue tongue_out underwear undressing vaginal vaginal_masturbation vulva walkies