Hamlet (Act 3, scene 2)
At this point, Hamlet has pretty much boarded the crazy train to crazy town. He asks Ophelia if he can sit in her lap, and when she's like "Oh, no thanks, I'm good," he asks her if she thought he was making a sexual advance. She says:
I think nothing, my lord.
That’s a fair thought to lie between maids' legs.
What is, my lord?
"Nothing" may seem pretty innocuous to our unlearned twenty-first-century ears, but in the 1600s, “nothing” was slang for “lady bits” and everyone knew it. (This puts Much Ado About Nothing into an entirely different light, does it not?)