From her Being a Submissive Diary
First and foremost is to understand that submission in itself is a service. A gift that the one person gives to another. In this boon where one person gains control over the other, the service can be in the form or giving pleasure or allowing pleasure to be derived from use of herself. When a submissive who loves pain enjoys the lashes of her Master, he receives the gift of knowing his lashes gave her pleasure. And her happiness brings him joy and in turn is service.
Still when we talk about service orientation we are not always speaking of the gift of carnal pleasures. More often, we are speaking of one person doing some task to please another. Still sounds like the usual concept of D/s but where some do house chores or some endure things their Dominant wishes. This is where a lot of the shadows fall and many lose sight of how any pleasure can be derived in these things.
Any submissive might do house chores or run errands for her Master because he gives direct orders to do so. A service oriented submissive does these chores in the belief that she will make his life a happier and a little less stressful. This is loving submission in that a submissive gives a gift to their Master that in turn often gains appreciation and love. I personally have happily done house chores for Dominants who cared about me and who I believe appreciated the work I did. It wasn’t for money, it wasn’t for gifts it was simply because it made them happy and gave them some extra peace in their lives.