To Grog

I would like to ask you some personal questions if you don't mind. The reason I am asking is because my husband is an electrician and works with copper wire all the time. Usually in the a.m. or just after he brushes his teeth and at other times there is a metallic smell to his breath. I am wondering if it because of the extensive metalwork he has in his mouth or something he has absorbed systemically from the copper wire. Does your wife or significant other ever mention your breath? Thanks.