animal_genitalia anthro ass big_breasts big_butt big_sheath breasts butt_transformation didelphid duo fench_(triprat) fully_sheathed futanari genitals gynomorph hi_res huge_butt huge_sheath hyper hyper_butt hyper_genitalia hyper_sheath intersex mammal marsupial merging min rochelle_(triprat) rodent sheath springhare thick_thighs