Naruto doesn't remember a lot of his childhood before he met the Uchihas (not that they know about him). He tends to block it out and focus only on the good things, like sunlight on his face (after almost a month locked in a random villager's basement to "contain the demon creature's venom from spreading further") and meditating (when he's absolutely certain he's safe, which isn't often) and Ichiraku Ramen (the owner and his daughter are kind and friendly and they /like him/. It's mesmerizing when he realizes).
So when Sakura asks whether he's ever learned proper manners for a dinner table before or if he's just always eaten like a stray dog, he doesn't notice Kakashi's grimace (even though Sasuke does, and his eyes narrow at the implications) and simply says, smiling, "I've never felt the need, Sakura-chan; if I'm going to be fighting for my life, I'm not going to have time to focus on the appropriate table etiquette." because she's not ready for the things he's seen yet.
Like he knows what Naruto's reflecting on, Kakashi catches Sakura's attention with a well-placed comment about a rip in the back of her dress that's showing off /way/ more than she most likely intended it to.
All in all, the fiasco ends with Kakashi getting a thumping, Sakura storming off to fix it, and Sasuke watching with narrowed eyes and whirring thoughts as Naruto leaves the table.
Without finishing his ramen.
