Hi from the UK
This isnt yorkie related, but one of my mums jack russells called Twinkle will always sniff and lick at a tattoo I have on the inside of my left wrist. The tattoo is of two black paw prints, but Twinkle doesnt bother with the tattoo I have on the inside of my right wrist of a purple tribal phoenix.
The paw prints were in memory of my dog called Tess, who died in 2008, two months before Twinkle was born.