My submission is not a "gift."
I am not a gift.
My body and the things I do with it are not gifts.
I'm submissive because it gets me hot. I like being tied up and held down and forcefully taken. I don't do it as a favor. I don't do it out of generosity. I do it because it makes me feel funny in my lady bits. It feels damn good and it makes me happy.
Please don't be grateful for my sexual proclivities. I think they're pretty awesome and all but I've never taken a beating as an act of charity.
D/s is an infinite cycle of give and take. It does not require that one partner continuously "gives" and the other "takes." It's symbiotic, not parasitic (at least it shouldn't be, or at least not for me).
Calling submission a gift diminishes its significance. Submission is significant because it is not a gift. It is a system of thought and action that I do for the sake of my self and my sexual expression, but is null and void without an equal and opposite reaction from a loving partner. It should never be a one-sided transaction.