>>1415674I dunno about the particular details of your relationship, but not everything sexual you do has to be explicitly within the confines of the dom/sub dynamic. Sometimes it's good to just let things go as they go, without worrying about anything. You can also get your dick sucked by him in a dominant fashion - relentless teasing and denial with his mouth and then maybe, MAYBE he lets you cum? That sounds pretty dominant to me.
I hope that helped!
