Rhys, the local human, is not particularly socialable. Indeed, he spends most of his time in house out towards the edge of Ponyville or else with Twilight working on how he is going to get home. He talks about home a lot.

One night, quite unexpectedly, Rarity finds him outside her door. He is very drunk.

She's annoyed by this, though less annoyed when she discovers the reason why.