He comes to. Did you expect anything else with his hard head?

"What the hell hit me!?" Natsu demanded as he shot up into a sitting position, steam coming out from his ears, as he was clearly ready for a fight.

"That thing," Happy remarked, pointing at the Notebook. "It just dropped out of the sky. This is why you don't tempt fate right here..."

Natsu grumbled as he snatched up the Notebook. "Huh? The heck is this supposed to be?" he asked, reading it, and wondering if it was a magical object.

He held it open, pondering as he considered how to use it... Honestly, he didn't really see what the big deal was about sex, but maybe this thing could help him understand it.