You do something with Rarity that you're not entirely proud of.
Afterwards, Rarity runs a hoof over your chest in a rather invasive fashion.
"Well dear, what did you think?"
She asks you in a sultry manner.
"Think about it, an entire world, created entirely for your pleasure. Doesn't that sound lovely?
You're a horny idiot.
"You don't need to agree to anything, but maybe a trial run, hm? In and out as it were. No commitment. Free to change your mind at any time.
She smiles at you, a smile that knows too much.