As a bottom, just like many others, it's only about making the top satisfied. The main reward for me is their seed and DNA becoming one with me. I frequently wear a cage now, which makes it even more clear that it's about the top I am with. Before discovering chastity cages, I often prevented myself from cumming by tucking my penis down in a jockstrap and getting fucked facedown.
Servicing tops and knowing they got what they needed is a great pleasure. When they don't bother / attempt to help me cum, it's a reminder of what a dirty cumslut I can be (especially when they stick their dick in my mouth to have it cleaned off after cumming in my hole).
Some experiences / themes where it's explicit that my hole is here to pleasure them, rather than them her to pleasure me:
Just today my partner brutalised my hole before eventually blowing his load in me. He asked me to wank off, but wanted me to go do it in another room.
Former partner regularly watched porn in the morning to get off before work. He would have me lay face down with legs spread so he could do a pump and dump as he fantasized about the guys in the porn and not me (he let me know this regularly). After he was done, he would just pull out and head to the shower to get ready for work.
Frequent online hookups where partner(s) bred me and did not attempt to get me off once they came.
