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4:5 anthro anus artist_name balls bodily_fluids butt canid canine clothed clothing erection feet foreskin genital_fluids genitals greyscale group hindpaw jockstrap jockstrap_only male male/male mammal monochrome nude obrien_(artist)pawpads paws penis precum presenting presenting_anus presenting_hindquarters soles text topless underwear underwear_only vein veiny_penis