Well, Gokudera better get used to it because he only speaks the truth. Well, okay, he can lie, for the Family's protection or interests. But he'll never lie to Hayato. Not if he can help it.

He does know about Gokudera's difficulties with communication. He doesn't understand them, but he's more than willing to let Gokudera figure out his own to communicate. Actions speak louder than words, anyway.

He lets out a little yelp when his butt is pinched and grinned down at him. "I'm going to hold you to that," he said as he reached down to give Gokudera's butt a light smack, then squeezed. "You already knocked bottoming out of the park. I expect you to top me just as well."

Yamamoto does get baseball sex puns, but playing along with Gokudera is more important than correcting him. "Fuck me out of the park!"