I wonder why you are feeling the need for a citron bag if you don't wear bags ... Perhaps you are just feeling the need for something citron? If so, it would be wise to choose an item that you actually intend to wear.
I also wonder: Do you really never go anywhere where you need a bag? How do you carry things you need to take along? In pockets? Or in a suitcase?
And that guitar-strap crossbody that you mention, isn't that a kind of bag?