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4_toes abs anthro athletic athletic_anthro athletic_male balls balls_expansion barefoot big_balls big_penis biped bottomless bottomless_anthro bottomless_male clothed clothing coat coat_only erection expansion fangs feet foreskin fur genital_expansion genitals glans growth hair hi_res huge_balls huge_penis humanoid_genitalia humanoid_penis hyper hyper_balls hyper_genitalia intravenous lab_coat lab_coat_only laboratory male mammal mo_(character)mostly_nude mostly_nude_anthro mostly_nude_male mouse murid murine neodokuro pecs penis pink_glans pink_penis pubes retracted_foreskin rodent scared scientist shocked solo teeth toes topwear topwear_only vein veiny_penis whiskers white_balls white_body white_fur white_hair