Well, i have a sweet younger top bud that always loves seeing me cum. Then, he knows for sure that the sex was hott enough for me to blow a load while he's fucking me. (He gets self-conscious) but also if he's going too fast, i will tell him to slow down and to not cum unless i tell him to cum. he says i work my ass muscles so well on his cock that he can't help but cum fast. But then sometimes i'm not able to cum so when he's says he's getting close i just tell him to go ahead and blow a load in me. This topboy is a hott fuck with a nice cock and can last awhile if i tell him to. But all in all, i don't think i "use" him for my own pleasure. We have a good, mutual, sexually-satisfying relationship. Although, idk how it would look with someone else's point of view.