You're spending the night with Rarity after having hay fries at a restaurant.
She walks into the house ahead of you, and you can't help but stare at her butt.
"Are you looking at my behind, darling?"
You blush a little.
"Be a dear and scratch it for me. It's dreadfully itchy right now."
You eagerly run over to Rarity's butt and start scratching it.
"Ahhh, that's better," she sighs.
You scratch her butt gently at first, and then start to scratch a little harder. Rarity's reaction tells you she likes this.
After scratching for about a minute, she says "That's quite enough."
You withdraw your hands, not wanting to have them on her butt for longer than she wants.
"I do believe I need a butt massage," she says. "Do you mind?"
"Not at all!" you say. Immediately you start rubbing Rarity's tush with your hands. Her butt is so soft, and you love the way it feels against your hands. You caress her rear harder, enjoying the feeling of it. You wonder if you're overdoing it a little.
"Ahh, that's perfect," she says.
Suddenly...
FFFFRRRT!
Rarity blushes.
"I'm so sorry," she says. "I didn't even see that coming."
"I really don't mind," you say, for this is another of your fetishes. "You don't have to hold back around me, not even when your rear end's right in my face." You keep rubbing her butt.
Rarity looks very relieved. She raises her butt in the air and lets loose with a flurry of loud farts. You sniff each one and love it.
PPPPPPFFFFFFFFFFFFFT!
"Oh my..." she says. "That one was rather unladylike even for today. A lady should not break wind so loudly. I need a spanking."
You don't bother trying to argue. You know she really just wants you to spank her. You slap her butt lightly.
"A little harder, please."
You spank her harder. Even now you love the way her rump feels against your hand. Rarity lets out a squeal with each one, sometimes replaced by a moan of pleasure.
After fifteen swats, she says "All right, that's enough. My rear end needs another massage."
You start rubbing Rarity's butt again. Both of you are enjoying this greatly.
About ten minutes later, she says "Now, lay down."
You lay down on the ground and Rarity sits on your head. Her butt is pressed against your face like a pillow. You love this just as much as rubbing her butt.
Then, she farts on you.
"Oh my... I'm so sorry about that."
"It's all right," you say. You're a little muffled under Rarity's tush, but you're sure she can hear you.
After about two minutes, she stands up.
"That was fun," she said. "Same time tomorrow?"
"You bet," you say. You snuggle your head against Rarity's butt like a pillow, and she giggles.