From the 1680 publication of "The School of Venus, or the Ladies Delight Reduced into Rules of Practice" by a safely anonymous author.
Artist: Similarly Unknown

[33]  I was pondering about these nicknames, which Mary uses in her tale.

 

      They might give us a hint to the choice of ‘Jonathan Swift’ as the pseudonym Gulliver chose for his book.

 

      ‘Swifty’ might hint to the speed in which Mary would reach her climax, that must have pleased Gulliver enormously, and ‘Jonathan’ might come from BigJon, in attribute to the size of Gulliver’s genitals.

Would you share with us the nicknames you're using?