It’s a metaphor for Anakin’s sexual awakening and temptation away from the Jedi Order. See, Dooku is a Sith and Sith are all about passion and emotions. Notice how he’s next to the vagina rocks, symbolizing passion and lust. And since he’s the bad guy, it’s foreshadowing Anakin’s eventual fall to the Dark Side out of his passion and desire for Padmé. And also, let’s talk about Geonosis itself. What’s it like? It’s a desert. As we know, deserts are a place of trial and tribulations and is where Jesus was tempted by Satan. Anakin is like Jesus, but instead he gives into that temptation and turns to the Dark Side. It’s also fitting that it’s covered in sand because he doesn’t like sand. It makes him angry and anger leads to hate and that’s the path to the Dark Side. You can gather all of this information just by looking at this picture. And people say the prequels were terrible. It’s like poetry, it rhymes.