(Emphasis ours)

James Brydges
"Emphasass mine."

Mercutio is talking about a medlar fruit, which was colloquially referred to as an "open arse," for reasons that can never be adequately explained. However, there is no such thing as a poperin pear -- it's another old-timey play on words. Separate "poperin" into its three syllables and you get an Elizabethan penis euphemism -- "pop 'er in."

Yep. Mercutio is saying, "What you need, my friend, is a chick who does anal."

Nicholas Joseph Crowley/Royal Shakespeare Company Collection
Mercutio, the original Dude-Bro.

In The Taming of the Shrew (more commonly known by its Latin name, 10 Things I Hate About You), Petruchio is trying to woo the frigid ice queen Katherine so that her insane father will allow her younger sister to get married. Luckily, Petruchio's preferred method of wooing is to engage Katherine in playfully sexual banter while wagging his eyebrows like Groucho Marx:

PETRUCHIO
Come, come, you wasp, i'faith you are too angry.

KATHERINE
If I be waspish, best beware my sting.

PETRUCHIO
My remedy is then to pluck it out.

KATHERINE
Ay, if the fool could find where it lies.

PETRUCHIO
Who knows not where a wasp does wear his sting? In his tail.

KATHERINE
In his tongue.

PETRUCHIO
Whose tongue?

KATHERINE
Yours, if you talk of tales, and so farewell.

PETRUCHIO
What, with my tongue in your tail?

George Henry Hall/Royal Shakespeare Company Collection
"STAGE NOTE: PETRUCHIO should immediately turn to the audience and start flicking his tongue whilst pelvic thrusting."

In his defense, she started it. Katherine takes his simple analogy about pulling out a wasp's stinger and twists it into that age-old indictment about men being thoroughly unable to locate key parts of a woman's anatomy. Petruchio smartly counters by offering to lick her asshole, and the game is afoot.

Smatprt
"Your feet, tail, ears, whatever. I'm down for anything."

Or at least that's what it looks like to us. But back in Shakespeare's day, "tail" was jack-jawing street talk for "vulva." So in actuality, Petruchio is merely building upon Katherine's barbed quip by offering to shove his face into her crotch. This is truly a battle of wits.

Realizing they have just struck comedic gold by comparing this woman's corpulent roundness to the planet Earth, the two men proceed to describe where on Nell's undulating ocean of obesity the countries of the world would be located. They start by declaring Ireland to be resting directly on the muddy banks of her asshole, because Shakespeare was English, and as such was required to hate the Irish at least as much as he clearly hated fat women:

ANTIPHOLUS OF SYRACUSE
In what part of her body stands Ireland?

DROMIO OF SYRACUSE
Marry, in her buttocks: I found it out by the bogs.

Royal Shakespeare Company Collection
"This was my Hit 'Em Up."

Get it? "Bogs." Meaning "shit." Anyway, they continue playing Carmen Sandiego with Nell's anatomy, doing their best to insult both her and other nations, including lines about Nell's big chin and nose, until this vaudevillian routine finally comes to a close on this blazing punchline:

ANTIPHOLUS OF SYRACUSE
Where stood Belgia, the Netherlands?

DROMIO OF SYRACUSE
Oh, sir, I did not look so low.

Thomas Newland/Shakespeare Birthplace Trust
After writing this line, he dropped the quill like a mic and pimped out of the room.

Yep. They're talking about her vagina, and how Dromio would rather punch his own face inside out than deign to look upon it. Incidentally, this conversation does nothing to advance the plot in any way, and Nell is never mentioned again.

OPHELIA
I think nothing, my lord.

HAMLET
That's a fair thought to lie between maid's legs.

OPHELIA
What is, my lord?

HAMLET
Nothing.

Agnes Pringle/Chiswick Town Hall
"Now quiet, the curtains are opening and I want to see if they match the drapes."

Ophelia is doing her best to be polite, and Hamlet is taking every single one of her responses and twisting them to be about her vagina. See, when she first declines his offer to put his head in her lap, presumably on the grounds that it is a totally insane thing for a grown man to suggest in a formal public setting, he clarifies, "No no, on your lap, not inside it. Did you think I meant country matters?" Drop the second syllable from "country" and you'll see what Hamlet is talking about.

Again, Ophelia politely tries to deflect his infantile japes by simply saying, "I think nothing," but Hamlet immediately quips, "Nothing, eh? 'No thing' is pretty much what I'd expect to find between a woman's legs." At this point, Hamlet presumably dons a spinning bow tie while someone in the orchestra pit plays a slide whistle.

George Clint/Victoria and Albert Museum
"Tell me, do you smell something fishy in the state of Denmark?"

Yep. She's talking about country matters. Venus is essentially saying, "We can make out for a bit, but then it's time to go downtown."

Francois Lemoyne
"And none of this 'I owe you one' bullshit."

Being a goddess and all, she pretty much has her way with Adonis like this for most of the poem, until he gets killed by a boar. It's something you would write in a feverish state of bitter, premasturbatory frenzy if you had a really extensive vocabulary.

Shakespeare's Twelfth Night, recently rediscovered by archaeologists in a discount-bin excavation of an ancient Blockbuster as She's the Man starring Amanda Bynes, is about a shipwrecked woman named Viola pretending to be a man for the purposes of hilarious comedy.

William Hamilton/Theatre Royal, Bath
Like Tracey Ullman, but funny.

A good deal of the play is devoted to a completely inconsequential subplot wherein several ancillary characters play an elaborate practical joke on a stuffy old butler named Malvolio by presenting him with a forged love note from the young lady of his house:

By my life, this is my lady's hand, these be her
very C's, her U's, and her T's, and thus makes she her
great P's. It is, in contempt of question, her hand.

Henry Andrews/Theatre Royal, Bath
"Alas, later tonight, the hand in use shall be my own."

Shakespeare was fond of all types of puns -- literal puns ("This ghost has made a grave mistake!"), visual puns, and wordplay that required the dialogue to be spoken aloud for the joke to make sense. Malvolio's line here is an example of that last type -- when the line is performed, it would sound phonetically like this:

"These be her very C's, her U's, 'n' her T's."

The stuffy old butler spells out "cunt" onstage, and immediately follows it by (phonetically) saying "and thus makes she her great pees." Essentially, Malvolio is telling everyone, "This is unquestionably my lady's vagina, with which she makes giant toilet."

Daniel Maclise/Tate
"And somehow you're still single?"

There are also some vague masturbation jokes hidden in there, as Malvolio makes it a point to emphasize that "my lady's hand" is responsible for making those C's, U's, and T's end with a great gushing P.

Sonnets in the 13th and 14th centuries were traditionally short 14-line odes to beautiful women. When Shakespeare came along, he stayed mostly faithful to that tradition, writing numerous sonnets about his love for gorgeous females. However, he would occasionally shift the focus of the narrative over to his bonerific wang, as seen in this excerpt from Sonnet 151:

My soul doth tell my body that he may
Triumph in love: flesh stays no further reason
But rising at thy name doth point out thee
As his triumphant prize.

Gerard Soest/Shakespeare Birthplace Trust
"It's the thinking man's 'Dick in a Box.'"

He literally says that his body "rises" at the sound of a girl's name and "points" to her. That is, his fully erect man saber is courageously battling against the laces of his breeches to leer at her through a wall of fabric like the ghost from The Frighteners. The undeniable DTF-ness of Sonnet 151 (and many of his sonnets in general) has frequently been used as a counterargument to the theory that Shakespeare was gay, second only to the sobering rejoinders "Who gives a shit?" and "What difference does it make?"

Regardless, Sonnet 151 makes it pretty clear that on this particular day, the bard really wanted to dip his quill in some lady's inkwell.

Richard Westall/Shakespeare Birthplace Trust
"Come now, ladies. You can't leave Willie Shakes shaking his willie."

Related Reading: For more Shakespearean insanity- including random-ass bear attacks- click here. And did you know that old Willy S invented many of the words we use every day? We owe eyeball, puking, alligator and many more to the author of Hamlet! Finish your bard binge by reading Swaim's argument for why Shakespeare would write for Cracked.com if he lived today.