Rainbow Dash knows that Rarity is always teasing her by being all sexy. So one day, Rarity wants to have sex, and she finds out that Rainbow is more awesome than stallions.

Applejack gets covered in cider, and Rainbow Dash has to lick it off for her. Then they find out that Rainbow Dash is the best at sex.

Twilight calls Rainbow Dash over to the library because she wants to have sex with her. Rainbow Dash is awesome at it.