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adam_isaac_novikov_(greengrizz)anthro banter bodily_fluids briefs canid canine canis clothing domestic_cat domestic_dog duo erection felid feline felis genital_fluids greengrizz hi_res male male/male mammal medical_examination medical_instrument menachem_mendel_(menchy)_rappaport molosser mountain_dog orange_background precum scientific_instrument simple_background size_difference smile stethoscope swiss_mountain_dog tighty_whities tuxedo_cat underwear white_briefs white_clothing white_underwear