rule 34 2021 anthro ass blue background bodily fluids bottomwear bottomwear pull canid canine canis clothed clothing clothing pull domestic flaccid foreskin genital fluids genitals hi res humanoid genitalia humanoid penis jockstrap looking down male mammal motion lines muscular muscular anthro muscular male open mouth pants pants down pants pull partially clothed penis pit bull pj pittiepj precum roamingthrough shirt simple background solo focus surprise tank top topwear uncut underwear 4528010