Rule 34 Dev - anthro barely_visible_genitalia barely_visible_penis breast_expansion breasts buckteeth bulge clothed clothing crossdressing derp_eyes dipstick_tail duo expansion eyewear gender_transformation genital_growth genitals glasses growth gynomorph intersex male markings muscular penis penis_growth scientist scottish tail tail_markings teeth thong transformation underwear spookaboo anatid anseriform avian bird canid canine canis collie domestic_dog duck herding_dog mammal pastoral_dog rough_collie sheepdog|492657130