You see that even an average dick is enough to make you cum handsfree. The key issue is to hit the right spot!
That bottom knows how to use his pussy. If you watch closely, you notice that he keeps Kegeling for minutes and his manpussy sucks the dick like a vacuum cleaner. This way, he had several prostatic orgasms which led to ejaculation.
Sometimes we need such tops that care about their power bottoms' orgasm more than their own orgasm.
In this video, the top's just providing the toy and bottom is doing the job on his own. That's great. Sometimes tops go through a very tiring day and don't want to spend their energy to fuck you. In that case, he just needs to get his dick hard and lay down. Perfect.