after_transformation alternate_species animal_genitalia animal_pussy anus aroused aroused_face aroused_smile artist_name balls becoming_erect big_balls big_knot big_penis blue_eyes blush bodily_fluids canid canine canis chest_tuft clitoris closed_eyes comic cowgirl_position cutie_mark dailevy derpy_hooves dialogue digital_drawing_(artwork) digital_media_(artwork) dock drooling duo equid equine equine_anus equine_genitalia equine_pussy erection excited excited_for_sex eye_reflection female feral feral_on_feral field first_person_view fluffy fluffy_tail forest forest_background friendship_is_magic from_front_position ftm_crossgender ftm_transformation fur gender_transformation genderswap_(ftm) genitals glistening glistening_eyes grass grass_field green_grass grey_balls grey_body grey_fur hair hasbro hi_res hooves horse imminent_sex interspecies knot looking_at_viewer looking_pleasured lust lustful_gaze lying lying_on_another lying_on_grass lying_on_ground male male/female mammal mane moan motion_lines my_little_pony nature nature_background navel on_back on_bottom on_top open_mouth open_smile outside outside_sex page_21 penetration penile penile_penetration penis pink_body pink_eyelashes pink_fur pink_hair pink_mane pink_tail pink_tuft pinkie_pie_(mlp) plant plump_labia pony puffy_anus pussy quadruped rear_view red_knot red_penis reflection rule_63 saliva sex shaking signature sitting sitting_on_another smile smiling_at_viewer species_transformation speech_bubble spread_legs spread_pussy spreading tail transformation translucent tree trembling tuft urethra vaginal_penetration wide_eyed wolf