Yep everything has to match. If I get given a mug, I donate it to charity. If I get a 4 pack of mugs, I keep them but won't use them if there are more than 4 people having a hot drink. I bought 2 of my dinner set then MIL got the same one, then decided she didn't like it so I actually have 16x everything in my dinner set. All my timber furniture is the exact same shade.
I don't match my bra with my undies though!