"Love means putting the needs of the other before your own."
That's service. It covers a lot more than the domestic things we think about -- my submissive's life is a service to me, and her service gives me the fulfillment I want of life.
By the way, it's a good idea for dominants to say 'thank you.' Often. Maybe some think that isn't a dominant thing to do, lol, but lots of folk need to lighten up.
hJ