Hi evoviii, splendid first post!
Given her pleasure in the toys, and thinking of where she's had you wear that watch, I reckon you could do with the best male bling there is: something really handsome and solid round your whole package, and your appetite and staying power will be more than a match for hers.
Take a look at a thread I set off [page 3 or 4 just now]: The Big O - steel cockrings as daywear.
Enjoy! The thread I mean; it is very clear that you are already enjoying your woman!