Short of handing your guy a detailed job description of your job, it can be difficult to convey what exactly it is you do day in and day out. Of course it's easier to grasp some jobs than others because they're more straightforward in nature, and some seem so obscure that it would probably be easiest to have a camera follow you around all day to make what you do more obvious.
Couples who work in similar industries can be at an advantage because it's easier to sympathize when you understand exactly what's going on without much explanation. When you're dishing about your day, does your guy understand? Or is he a handsome listener who you love but doesn't really get what you do for a living?