Dun
From Create Your Own Story
You decide to take on the Dun mare, since you like the looks of her. Her hair is black, fur yellow as the sun at dawn, and something about her eyes gets to you. You jump over her stall door and approach her. She seems friendly to you, getting close for you to pet her mane. Her fur is wonderful to pet, silky and soft to the touch. You've never had shame in admitting anything turns you on like the sexual maniac you are, and indeed you've had some interests in trying bestiality.
You move your way around the horse, petting her and feeling her skin slightly shake as you do, and you arrive at her shiny tail. It suddenly rises, and you think it's because she's being nice to you, wanting you to take her. That however changes you see something coming out. She's taking a crap!
