Hi tessa,
that's a difficult, quite philosophical question. I'm not sure if, with that constraint called life we all carry with us, something like "total submission" is really possible without a total loss of oneself. Submitting totally would mean loosing all those moments filled with excitement, fear and sweaty hands along with the joy, satisfaction and gratefulness afterwards of having been led (and having let myself be led) to overcome my limitations. I wouldn't want to loose that.
Sexual submission is a lot like mountain climbing. After the first excitement you find yourself really tasked, often insecure about the next steps. If you look up at your target, you don't think you can make it, but you keep on climbing because you know that there's a big reward waiting for you. Even if you hurt and are exhausted, you will yourself onwards, sometimes with bare millimeters of grip left for your aching fingers. And somehow you make it to the peak and experience a freedom only few others know, and you ride it as long as you can.
But, inevitably, you have to climb down again and face your usual life, and you mourn for the feeling of having reached the peak. But, luckily, there's always a higher mountain - tough more tasking, but with a higher peak.