The first time their marks touch is a complete accident. They are at Sugar's pool party when Blaine suddenly jumps on Kurt's back with the intent of getting him to give him a piggyback ride over to the food. They had both promptly lost their balance, gasping in shock at the sudden warmth that had sparked from where their marks had touched, and fell sideways into the pool.

"Blaine. My hair is ruined! You can't just jump on a person like that!"

Blaine edges over to Kurt and attempts to kiss him where he is clinging to the wall. With a small splash Kurt dives forward and pushes Blaine's head under the water, kneading through his hair and loosening his helmet of gel. Thirty seconds later, he lets go of a flailing Blaine, who pops out of the water, glaring at Kurt.

"KURT! You ruined my hair on purpose" he pouts, trying but failing to keep the smirk off his face at the sight of Kurt's wet, limp, hair.

Kurt shrugs, poking his tongue out at him. "It looks better like this anyways."

"It most definitely does not."

"Ok, so maybe it doesn't but please can you ease back on the gel a bit? If only for the sake of me being able to do this?" Kurt asks, combing his hands through Blaine's hair lightly. "It's really nice to be able to touch your head without fearing my hand will get stuck."

Blaine huffs, unable to help the smile spreading across his face as he moves his hand closer to Kurt's. 'We can talk about it if it means so much to you."

"Now that that's settled, do you think we can climb out of this pool and dry off?"

"So earlier..." Kurt starts to say, trailing off as he brushes his fingers over Blaine's mark, watching his progress from where he is laying on Blaine's chest "when you jumped on my back..."

"Mmm?" Blaine makes a questioning noise in the back of his throat, kissing Kurt lightly on the head.

"Was it just me that felt a sort of - jolt?"

Blaine is silent for a moment before speaking. "I... yeah, no I felt that too, I forgot about it right away with the whole falling-into-a-pool thing, but yeah no I definitely felt that."

"I didn't realize- no one ever told me that your mark does that. They don't teach you that in health class."

"I don't know why... we should umm, we should test it out again later? See what happens if you aren't so startled you fall into a pool?"

"Yeah, sure, want to go do that now?" Kurt asks nervously, blushing lightly at the thought of being shirtless and alone with Blaine.

"Mmmm nap first?" Blaine asks, yawning sleepily.

Kurt giggles. "And people say I'm a cat? Every time we're curled up in a sunbeam you want a nap."

Blaine hums into Kurt's ear in response, tightening his grip on him. "Only when you're with me. It's not my fault you're so good to cuddle with."

Kurt bites back a grin. "Whatever you say... Go ahead and nap, we'll leave in a bit."

"You nap too" Blaine mumbles, turning slightly to nuzzle Kurt. "Want you to nap with me."

"Yeah, yeah" Kurt chuckles. "I'll nap with you, don't worry."