In the new pictures from Maui, I notice that Andrew appears to be wearing a ring on his right index finger.
Being a bit of a geek I looked up the significance of wearing rings on index fingers, and this is what I came up with:
"The Index Finger - The Meaning of the Index Finger for Rings: Authority & Ambition - This finger represents our need to increase our ego and establish authority and power. It is also associated with leadership and ambition. Kings, priests and healers wore rings on the index finger because that finger was thought to be especially powerful. People often wear a ring on their index finger to demonstrate assertiveness, or power."
I wonder if Andrew knows this, or if it is simply a case of that's the only finger the ring would fit!