Dean was an evil, evil friend who knew how to torture him and occasionally did so. But it was okay and Seamus still loved Dean despite it, even if Dean was a giant and occasionally flaunted his broad shoulders and arms.
Issuing a shout that would have made more sense coming from a teenage girl and one that Seamus would deny having made, Seamus spluttered and blinked his eyes furiously in an effort to try and get the water out of his eyes. Rubbing his eyes, which were just as wet, he tried to use his soaked shirt to try and mop up his face. When that didn't work, he used Dean's shirt, which was considerably more dry than his, to wipe his face
It was muttered and barely audible, but Seamus definitely said, "You wanker," as he blew his nose into Dean's shirt.
He pulled away with a shit-eating grin, which melted into a less smug smile when Amber interrupted the fight that Seamus was about to escalate. "Hey Amber," he said, sauntering over to her. Amber always did feed his ego rather nicely. She was growing up to look just as beautiful as her mum, he noticed. "Aw, your mum loves me. I'll just blame it on Dean." And even though Amber looked really pretty dolled up, Seamus engulfed her in a very wet hug and lifted her off the floor while he was at it.
See? He wasn't too scrawny.
Letting Amber go after a moment, he shot Dean an amused look over his shoulder. "Has he now?"