I am very encouraged to know that you can potty train a boy before three (my youngest is a boy)! That being said, I have potty trained two girls by the age of two. What I did for both of them was to potty train with the poop first, because I was able to tell when they were going poops so I would just whisk them off and put them on the potty. I never had any problems with that. It took them both maybe a week of me putting them on the toilet every 20-30 minutes so we could catch the pee in the potty. Sounds like your little man really has the hang of it. Just keep him close to the potty for a week or so and keep putting him on the potty at the times you know he usually has to go. Make sure you don't ask him if he has to pee, just tell him it is time to sit on the potty. I think most people make the mistake of asking kids if they have to go instead of just making it a command. I mean, you don't ask if they want to take a nap right? Keep up the good work!