Fluttershy and Rainbow Dash are a pair of Breezies (Think human-style fairies with antennae) who frolick across the Everfree Forest in search of food and fun.

However they happen to run into a rogue bunny rabbit and decide to sate his hunger in their own way, and compete to satisfy his needs!

A sort of tribute/parody of the hentai manga Bondage Fairies.

https://www.fimfiction.net/group/214700/dirty-little-secrets-dirty-little-contest