Not dumb at all bud, I count my shakes as meals whether I eat something with them or not. Shakes run typically 20-60 grams of protein per, depending on the brand/type. Anything that high in protein should count as a meal.
Keep in mind that (IMO), there are two different kinds of protein shakes. The "regular" ones like I use that are higher protein, lower fat, carbs and calories. Then there are the "meal replacement" type shakes that vary in protien content, but usually be higher in the others.