I never realized some men were so prolific with pre-cum. None of my friends or acquaintances ever had that condition. While I can see that being a "leaker" could at times be aggravating, on the other hand it's really an example of the fully functional male genitals, having a cock that responds when it's ready to go to work, and delivers the silky fluid necessary for smooth penetration naturally. There's no interruption in the action, to dribble lube or waste time to finger her pussy with saliva. I've never had adequate pre-cum. My method was to take time to eat a pussy enthusiastically which got it so juicy I could slide my cock right in, but leakers obviously have the advantage if you're in a situation where you are horned up, short of time, and need to get off quickly.