Self-reference and breaking the fourth wall.
"Oh yeah... Huh!" Ed looked around, brightening. "Wow, it looks a lot different upright and not burning."
"I can't be this old and still a virgin," Ed snickered. "I mean, you've been with someone, right?
"You can't do that! This is a shounen series!" he hissed.
"You know it's a good thing I heal almost immediately, because otherwise I'd be so sore, I'd never get anywhere in the story."
"You have no idea how good you look right now," Roy said.
This was getting crazy. He knew that his college years ran equivalent with his sexual peak, but honestly?
Ed's heart began pounding in anticipation of the rush he'd feel when the process was over.
He could imagine the words Fix typed as coming from his brother, and it afforded him a little bit of indulgence in his horrible, sinful, uncontrollable urges.