Kneeling in front of my boyfriend, his hard cock in my mouth, his hand on my head holding it in place while he slowly starts to fuck my throat feels like the most natural thing to me. It's perfectly clear that I am there for his pleasure and satisfaction, nothing else. I always look up to him, seeking eye contact to tell him I'm there to be used by him. We're both into spit, so from time to time, he'll take out his cock and spit in my mouth which is just as good as cum for my taste - not sure why but I totally get off on taking the top's spit in my mouth and swallowing it. I would find it extremely humiliating in any non-sexual context and I'm sure many guys don't like getting spat in their mouth during sex, but for me, it's another form of submission the top - similar to sucking cock and swallowing cum but kind of more intimate since it can be combined with kissing. If things get a little heated, he'll also pull his cock out and slap my face with it or he'll slap me with his hand or do some light choking, feeling his cock sliding down my throat. Finally tasting his load in my mouth or feeling his cock pulse while he shoots his load down my throat while he pushes his hipbone against my face is like the ultimate reward. I usually have no need to cum myself - having pleased him and getting his cum is all I need. Won't say no to getting fucked, of course, if he's ready for another round.
I had a lot of trouble taking my boyfriend's cock down my throat initially, due to his girth and my lack of experience at the time, and I was really frustrated. Just sucking him off without taking him all the way felt like getting fucked with the the cock only being pushed inside halfway. I used lidocaine to reduce the gag reflex and he let me practice on his cock countless times until I could take it with little to no gagging - I felt so happy when I was first able to take his cock completely.