Searching for Mane 6 fic (comedy) [NSFW]

I’ve been trying to find a certain fic where the Mane 6 are discussing their sexual experiences (not really a clop-fic).
 
At the end of the story, Rarity is worried that their conversation is upsetting Fluttershy, only for Shy to admit that her first time was with an older mare, and Rainbow Dash is outraged that Fluttershy had an experience before her.

It’s not the story you’re looking for, but I highly recommend Estrus. It’s about the mane six discussing how they learned the facts of life (in that same sort of not-clop style), and it’s completely hilarious.