Once Seamus felt Dean straddle over his legs, he had to burry his face into his pillow. Partly because he was blushing as well, but partly because he had to keep himself from laughing over the situation. It made him completely forget that Dean was going to pop his shoulder.
"Aye, I can be clever sometimes, thank you. I don't know it could be a dog, but I'm just going by what we were taught. It's too soon to know right now."
And then he remembered about the shoulder popping. Taking a deep breath, he muttered "go ahead" then bit into his pillow to muffle any screams, be it from pain or reflief.