There is no dominance play with Seth and the only reason for that is because you have to reign him in. He wants things to be fast, quick, nips here and rough foundling there. It's cute in the way that you're trying to figure out where he's going to go next, but sometimes things just need to go their own flow. A finger gently placed on his mouth with a seductive smile, then hands slowly grazing his chest, abs, carasseing all the way down to his cock. A hand wraps around it with a low moan from Seth, then lips over that moan as a slow pace is set. Even though things have calmed down he still hasn't gotten the message as he turns the passionate kiss into frantic ones that then miss thier mark and go into the crook of the neck.
It's time to give up and quicken the pace of your hand so much that he groans and starts thrusting, which soon leads to the hand disappearing and the real fun beginning.
Maybe this is a power play, but in Seth's own special way.