Does anybody know why some guys shoot their loads and others dribble them out? It seems like most dudes spray, or am I wrong?

I don't know what determines it. I've heard some people talk about doing kegeil exercises but that seems like baloney. It might be something about the physical makeup of the guy's organ. I've also wondered if there are drugs for dudes that help them launch like Peter North. It's something I wonder about enough to post here.