Ah, but with how English has shifted over the centuries, the necessary domain knowledge has slowly been disappearing. Shakespeare's plays now and then [0] are slightly different (and back then, dirtier) because of it. (Jump to 2:30 for an explanation and example, then at 7:58 is the dirty pun that doesn't exist in modern pronunciation.)
[0] https://www.youtube.com/watch?v=gPlpphT7n9s