The Breast in Literature

 
In Shakespear's Cymbeline, Posthumus Leonatus, banned from his home in Britain, declares that his beloved wife, Imogen, is virtuous and cannot be tempted by any other man. Iachimo boasts that he can prevail over her virtue and they make a wager. Traveling to Britain, Iachimo steals into Imogen's bedroom while she is sleeping and secretly spies on her:
 
On her left breast
A mole cinque-spotted, like the crimson drops
I'the bottom of a cowslip: here's a voucher,
Stronger than ever law could make: this secret
Will force him think I have pick'd the lock and ta'en
The treasure of her honour.
 
When Iachimo returns and boasts of his victory, Posthumus Leonatus is reluctant to believe him. But when Iachimo describes the mole, Posthumus Leonatus is convinced.
 
If you seek
For further satisfying, under her breast—
Worthy the pressing-lies a mole, right proud
Of that most delicate lodging: but my life,
I kiss'd it; and it gave me present hunger
To feed again, though full. You do remember this stain upon her?