As someone with a small cock, I rarely can get a girl off just by fucking them. So now I don't even try, once I cum, I just know I have to go down on them and finish them off with my tongue. As I'm doing that and eating all of my cum, I get hard again and I'm ready to fuck them again after they cum. The first time, the girls are disappointed since I cum so quick, but once then know what I'm doing, they love it.
Plus one married woman also liked that I cleaned up my mess before she went home to her husband.