One

"You're willing to break your neck just for some ass?" If he was honest, Sasuke didn't mind experimenting with new positions, and he would gladly ride Naruto's face like a bicycle seat if he wasn't so concerned he could hurt his Alpha. But apparently, it was just him because the moron didn't even seem to care.

"If it's your ass then hell yeah! You have no idea what I would sacrifice for it."

OR

The one where Naruto rails Sasuke in the locker room after winning a big game