after_transformation alternate_species animal_genitalia animal_pussy anus aroused aroused_face aroused_smile artist_name balls becoming_erect big_balls big_butt big_knot big_penis blue_eyes blush bodily_fluids bubble_butt butt canid canine canis claws clitoris comic cowgirl_position crossgender cutie_mark dailevy derpy_hooves_(mlp) 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 eyes_closed fangs 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 genitals glistening glistening_eyes grass grass_field green_grass grey_balls grey_body grey_fur hair happy happy_sex hasbro hi_res holding_partner hooves horse internal interspecies knot knotting laugh 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 paws penetration penile penile_penetration penis pink_body pink_eyelashes pink_fur pink_hair pink_mane pink_tail pinkie_pie_(mlp) plant plump_labia pony puffy_anus pussy quadruped rear_view red_knot red_penis reflection rough_sex saliva saliva_string screaming sex shaking signature sitting sitting_on_another smile smiling_at_viewer species_transformation speech_bubble spread_legs spread_pussy spreading tail teeth tongue tongue_out transformation translucent tree trembling urethra vaginal vaginal_knotting vaginal_penetration wanting_more wide_eyed wolf yellow_eyes