One possible narrative could be that a cowgirl, who is very confident and in touch with her sensuality, discovers a large, ornate mirror in an old ranch house. As she stands in front of it, she begins to explore her own body and movements, feeling a new sense of empowerment. She might start by simply looking at her reflection, adjusting her hat and boots, and then gradually move into a more intimate exploration, twirling and swaying in a way that makes her feel alive and in tune with herself.
Once upon a time, there was a cowgirl named Lily. She lived on a big ranch. Every day, she would ride her horse, a beautiful brown mare named Daisy, to herd the cattle. One day, a storm came suddenly while she was out in the fields. But Lily was brave. She led her horse and the cattle to a nearby cave for shelter. After the storm passed, they all returned safely to the ranch.
I'm not sure specifically which'sex dog story' you are referring to. There could be many stories involving dogs that might have some relation to the concept of sex in different contexts, like in the study of animal behavior regarding reproduction.