{Some NSFW Kurt because I am a happily nasty person. Ahem,}

I think I’ve mentioned this somewhere else before but I’ve always thought rubbing/touching the tip of Kurt’s tail would make him all affectionate (as if he isn’t always) and purry but the base would make him nut and almost overstimulate

Sitting next to Kurt while he’s curled up on a couch reading very common for you two, sometimes he’ll read to you happily, in English or German but this time you were just growing bored.
his tail had just sent down his tea cup, you gently grab it, not really alerting him yet since it’s not something unusual for you to do. Without much force you guide his tail towards you, Kurt still not taking his attention from his book.

You start placing light kisses along the spade like tip, Kurt stiffens as soon as you start.
You can tell he’s getting flustered already by how he raises his book higher and closer to his face, still not relaxing but you can definitely hear faint purrs like he’s trying to hide them.

 You smirk, placing one last kiss on it before nibbling on the edge lightly, very curious to what will happen.
Kurt squeaks, dropping his book and looking at you wide eyed, you can now see just how lavender his face is before a puff of blue smoke and your suddenly back in his dorm on the bed with a very flustered Kurt now shyly looking to the side
“Oh? Kurt I thought you wanted to read?” his tail starts swaying, tugging slightly as you still have your hand around near the tip. Kurt swallows, looking back and you, panting slightly and looking back and forth from you to his tail.
You smile coyly “did you like that?” Kurt nods rapidly, his breath hitching went your lips meet his tail once more, feeling your teeth glide against the increasingly sensitive tip.

and, Bonus: Kurt would love it if you grabbed his ass and started kneading it, and if he was on your lap when you started it? he’d almost collapse on top of you, purring into your neck, his tail swishing back and forth (if you keep it up his eyes will roll back and he will start unconsciously grinding against your leg