Picture courtesy of http://malesubmissionart.com/
Getting my Goddess' coffee ready in the morning before she gets up, preparing her shower with towels and required supplies, helping her get ready for work, preparing her food, cleaning up after meals, making sure she always has something to drink, holding her ashtray, running for errands, or serving in a myriad of other ways are all service for the sake of service within our D/s relationship. Service doesn't have to be sexual.
I think it helps to be serving within that larger relational context, that of our love for each other and our D/s dynamics. Without that, perhaps the individual acts of service would not mean as much, and service would be enthusiastically done only if there was a sexual element to them. But in the former greater framewok, service is very satisfying and meaningful as it makes her life easier, more pleasant, and more fulfilling, all things that I know are deeply appreciated by her.
To a certain extent, service is about going beyond what my Goddess wants and requires of me. I think that the true merit of one who serves is in the initiative. Being told to get a task done is one thing, pre-emptively meeting needs, and/or meeting them beyond expectations, when applicable, is even better.
Service coud/should even be extended to emotional support and being a good companion/partner, a further blurring of the lines where our D/s dynamics and our overall larger relationship overlap. Overlap... or does there really need to be a difference?
Not to say that sexual servitude to her isn't addictively mind-blowing and doesn't provide a deep sense of both surrender and satisfaction. But it's only one aspect. And I think that dealing with the mundane and routine so that she doesn't have to is particularly rewarding because of the element of altruism, of a greater good, of sacrifice for the other.
The symbolism of it, combined with the sense of my ownership by her, make even the smallest gesture of service a matter of pride and dedication, and that is why I enjoy service to my Goddess.