For me it means that in one area of my life i release control, and revel in that fact. i'm extremely controlled in my everyday life, it's half a part of my nature, and half something i was taught from a very young age. But it's always felt like a heavy weight on my shoulders. When i submit it allows me to let go of that tight leash of control and put it into the hands of the One i trust. It's that age old find in bdsm where i find my freedom in handing it over to another. For me it is about giving up total control, but it's not about doing absolutely anything i'm told. Within reason - yes. But i'm not a push over, when i submit i do it because it makes me happy and it makes my Owner happy, but i'm not His mindless drone. i have limits, both hard and soft, and they are respected.