FURVERT!

5:3 absurd_res anthro big_muscles big_penis blonde_hair bodily_fluids canid canine changing_eye_color clothing duo ear_piercing expansion flexing floor fluffy fluffy_tail fur gas_mask genital_expansion genital_fluids genital_markings genital_piercing genitals green_eyes green_fluid green_veins grey_body grey_fur growth hair hairless_feet hairless_hands hi_res hose hose_in_navel huge_muscles huge_penis humanoid_genitalia humanoid_penis hyper hyper_genitalia hyper_muscles hyper_penis jack_al-inpu_(flusspuss)jockstrap laboratory male male/male mammal markings marshiro mask murid murine muscle_growth muscular muscular_arms muscular_male muscular_thighs navel_insertion nipple_piercing nipples notched_ear nude pecs penis penis_expansion penis_markings penis_piercing piercing prince_albert_piercing rat rat_tail red_eyes red_penis riley_(flusspuss)rodent scientific_experiment sequence sweatdrop_(iconography)tail tile tile_floor tongue tongue_out transformation tube tube_in_navel underwear vein veiny_muscles veiny_penis white_body white_fur worried yellow_markings