Background Pony #5592
Because they are both Wonderbolts this reminded me of something.
I once had a friends with benefits who was really athletic (big time into swimming). For the life of me I have no idea why she was into me other than we were both nerds, but whatever.
I will never forget when she finally agreed to anal (I prefer this far more than vaginal) and she ended up liking it quite a lot.
It cannot be stressed how amazing the ass muscles of an athletic girl feel against your dick during the zenith of sex feel.
I can only dream and guess at how amazing a Wonderbolt could anally please.