Loved your post, especially the dominance aspect about it.
My fuckbuddy and I have pretty clear boundaries in regards to the dominance and control, he has all of it and I am to be completely passive and subservient to his needs, the power dynamics and role plays works well for us. So he generally likes to blow his load deep inside me and breed me. Its like he is marking his territory and reminding me of what he completely owns and totally belongs to him, that is my arse. in effect treating me like a piece of property. His preference to breed me though is because after his blown his load down my hole, he will often get me to suck on his dick so that those last drops of cum come out so to speak. I feel privledged that he allows me to take the opportunity to care of him in this manner. Getting a few drops of cum is a rewarding experience.