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anthro bad_end balls_expansion bite_mark bodily_fluids body_writing canid canine cum cum_in_urethra cum_inside english_text equid equine expansion forced genital_expansion genital_fluids genitals group hi_res horse male male/male mammal multiple_insertions multiple_penetration murid murine penetration penile penile_penetration penis penis_in_penis rat ratboy ratdraws rodent tally_marks text urethra urethral urethral_bulge urethral_penetration urine watersports western_tally_marks