Did Leonardo da Vinci paint two Mona Lisas? Where are they?

While overall similar, there are differences in the shape of the face, the background and other details.

There is only one Mona Lisa, at the Louvre, fully credited to Leonardo. However, there are several Mona Lisa look-alikes from his studio, some of them quite saucy. The one most similar to the Louvre one is the Prado Mona Lisa, a copy made simultaneously in Leonardo's workshop while he painted the Mona Lisa, probably made by an apprentice(s):

Then there are the ‘meza nuda’ paintings from his workshop, often referred to as Monna Vannas.

Why did you put a guy’s dick in your mouth the first time?

Source: Chantilly, Musée Condé, France.

Donna Nuda:

Another version of the above exists, attributed to Salaj:

For those who were actually old enough to have experienced the 1970s and not for those who were born in the 70s. What were the pros and cons of that era?

La Joconde nue:

Obviously, the original Mona Lisa also inspired some cheeky versions of her.

Source: St Petersburg. Hermitage, Russia.

What caused the stock market to crash?

For the one below, art experts suggest that it contains touches indicating that Leonardo contributed to it.

Source: Louvre, Paris, France.

Evidently there was a market for erotic paintings. The American art historian David Brown, curator of Italian Renaissance paintings at the National Gallery of Art in Washington, has suggested that da Vinci painted a saucy parody of the Mona Lisa for his patron Giuliano de Medici, and that the Salai version is a copy.

What should I do if I love a girl and she apparently doesn't love me?