...and Gemini the twins are also depicted as The Lovers in other versions of the zodiac... and in Sam Geppi's explanation of the zodiac (
link) in the Mayan version Gemini is depicted as fornicating pigs.
I don't think any one zodiac sign represents sexual desire, that's too narrow a view of an archetypal energy, but rather they do - different aspects of the same.
(sorry if this is off topic, I just wanted to finish my thought in my earlier post)