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

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):

Source: St Petersburg. Hermitage, Russia.

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

A rare shark is seeking refuge in Miami's Biscayne Bay. Here's why scientists just spent 8 years tracking it - BBC Wildlife Magazine

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.

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

Source: Louvre, Paris, France.

What can I do after 18 cops raided my home, without a warrant, seeking a person who didn't live there and wasn't there, and also went through all of my stuff? The person wasn't on the lease, and they didn't see him enter.

Source: Chantilly, Musée Condé, France.

Another version of the above exists, attributed to Salaj:

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

How is Sola Scriptura incoherent?

La Joconde nue:

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

Donna Nuda:

If everyone in Russia dropped into holes in the ground only never to return, would that be good for NATO and international peacekeepers? Can we convince Russians to be less diabolical, so they coexist? Does Putin stink like doo doo in the commode?