"I have a milkman and I'll have you know that aside from the funny business with me wife, Lawrence is a pretty standup fellow!" Seamus said, before stinking his tongue out at Dean oh so maturely. He never claimed to be the most mature of guys around, so he had no standard to deviate from. "At least I expect that betrayal from him though. But you, my best mate? I don't know if I can believe you..."
Seamus was constantly moving and flirting with anyone willing to indulge him for a few minutes and even those that wouldn't. He could flirt with a rock, if given the the dare, because he was just that kind of guy with a thing to prove. He might not be the strongest, the tallest, or the best Chaser around, but he could charm the knickers off McGonagall (fanciful thinking) if he put his mind to it. And he was a bit delusional. But wouldn't it be a challenge to find someone willing to put up wit his shite?
Y'know, aside from Dean. But he couldn't exactly marry Dean. Right?
"I knew it!" He crowed, drawing a few irritated looks, but more amused ones from the patrons of the bar. "You're just looking for a way to get into me bed. I'm onto ya, Thomas."