Regarding the crescents - they relate to bulls' horns? as you mention in your fieldnotes for elsewhere? The red thing is obviously a recurring theme too, then. Interesting..
I dunno Rhiannon,
you read about bull cults and such, I'm not convinced, but to be honest with you I'm pretty ignorant when it comes to Sardinian prehistory.
I would love them to be lunar but then that's just me a personal thing.