How so?
Those words were in common ( meaning "vulgar" )usage,at that time and even the very lowest of the low ( more so than others, even ), who saw his plays knew what they meant.
A very easy one, to understand now, because the vulgarity is still in usage, is in TAMING OF THE SHREW, in the iconic first meeting between between Kate and Petruchio...using the word "TAIL"; which can be taken 2 different ways!
And that's one of the very LEAST of the examples I can give you.
Cryptic profanity and as applied, allusions are parallel. Allusions aren’t always profane.