Love Hina

Haruka:
You're just like Seta. You know nothing about women's feelings. Naru's not like me, you know; if you want to keep your relationship alive, you gotta do "that."

Keitarō:
[Surprised] What? Do "that?" You mean "that?"

Sara:
What's "that?"

Haruka:
[Slaps Keitarō in the face] Don't say it so loud! When I say "that," I do mean "that." You're an adult, you know what it's all about!

Sara:
What's "that?!"

Keitarō:
Oh, yeah! Sure, it's "that!" We're grown-ups after all-- [Sara starts choking him, demanding to know what "that" is.]