Maybe because I am getting older 😃 but I don't really have the need or urge to ejaculate or have an penal orgasm when playing with myself, or a guy/woman. If I do anything will come to an end, and that I don't want. Actually a lot of times I can't come to a ejaculation when just doing "regular" sex.
However I have much more pleasure in self simulation or making the other partner enjoy him/her self.
Mostly in the weekends, when I am playing with my butt, my sessions take on 2 to 3 hours, each, I might do 3 of those in a weekend. Daily training sessions are about 1 hour, but has only the training of the sphincter in mind, and none of them end in ejaculations, as a matter of fact, I leave my dick alone, only so often touching him. My pleasure is pure in my butt and mind.
Those times that I do want to ejaculate I will do so after I am mentally satisfied. After I cleaned up the toys I will continue the movie or what ever and just think of that moment with my dick. This is only a few times in the week, it does not excite me as much.
Perhaps that just me, but I am fine with that. And like someone mentioned its a natural thing for man to stop thinking about SEX after they ejaculate.
Just my 2 cents...