FURVERT!

aaron_(brossette)absurd_res animal_genitalia animal_penis breeding_mount cover cover_art cover_page eastern_grey_squirrel english_text equid equine equine_genitalia equine_penis expansion expansion_while_penetrating genital_expansion genital_growth genital_transformation genitals grey_squirrel growth hi_res horse humanoid_genitalia humanoid_penis male mammal masturbation oblivious penetrable_sex_toy penetration penile penile_penetration penis penis_expansion rex_equinox rodent sciurid sex_toy solo text transformation transformation_through_masturbation tree_squirrel unaware_transformation vein veiny_penis