5. "So, Did You And Ginny Do It, Then?" - Half-Blood Prince
The Line: After Ginny hides Harry's book in the Room of Requirement, she gives him a kiss and declares, "That can stay hidden up here too, if you like." We cut to Harry walking along when Ron catches up to him and the following dialogue takes place: Ron: So, did you and Ginny do it, then? Harry: What? Ron: You know, hide the book? Harry: Oh, yeah. Why It's Ridiculous: For starters, Ginny's line about keeping their kiss hidden is pretty wince-inducing, but the innuendo of the following scene is just outrageous, as Harry thinks that Ron thinks he's just boned his sister. Perhaps the scene might've been more bearable if there was any actual chemistry between Daniel Radcliffe and Bonnie Wright, but as such the whole sexual suggestion seems daft and misplaced.