Thanksdijmart wrote:
I like your avatar

I chose it because I like how the viewer can choose to focus on the two separate faces looking at each other... or shift focus to see the space between them which seems to take the shape of a goblet (or grail... if you like.

Then, the viewer can shift focus again and see the two faces and the grail as making up one unified image.... (noticing that, if the seemingly separate faces weren't there, there wouldn't be a grail... and vice versa).
Also, I like how the entire image relies completely on the viewer...
No viewer= no image.