FURVERT!

2:3 animal_genitalia animal_penis anthro backsack balls balls_expansion big_balls black_balls black_tail bodily_fluids butt comic count day_count edward10186 english_text equid equine equine_genitalia equine_penis expansion fleshy_tail fur fur_growth genital_expansion genital_transformation genitals growth hi_res horse human human_to_anthro injection light_body light_skin male mammal orange_body orange_fur penis purple_veins research short_tail small_tail solo species_transformation sweat sweatdrop tail tail_expansion tail_growth tail_nub tan_body tan_fur text transformation transformation_sequence transformation_through_injection vein veiny_balls veiny_legs veiny_penis