If I have 2 different attribute options (color & size) and I want some products to have those attributes or combinations of those attributes, do I need to set up a different product type for each combination?

eg

- Some products will have no attributes
- Some products will have the size attribute
- Some products will have the color attribute
- Some products will have the color and size attributes

Will I need to set up 4 different product types?

When I create a product entity and select no attributes, the product display node still displays a drop down of the attribute but with "none" as the only option.