There's the excitement of the new, that's for sure. And newness creates energy. So as time goes by and the D/s relationship evolves and even settles a little bit, the energy of the 'new' lessens. But, a different energy replaces it. The energy of increasing trust. The energy of growing knowledge, both of self and each other. The energy of knowing that you truly do have each other's best interests and needs and wants at heart.
At this moment, I sit here with my Dom, who I chat with every day and see approximately every three months for a week at a time. You may wonder - "Why are you online rather than getting the you-know-what beat out of you? What's wrong with Him?" The truth is, it's not all overt D/s between us. There is no schedule. But - and this is a big but - if He decided I was done playing online for today, I'd be done. Period. The fact of my submission and His dominance is just there, like the air. I like it that way...and it feels comfortable and right to me. To Him too, I think.