I started PT 4 days ago and I just keep putting him on the potty every half hour or so and he hasn't had a pee accident since day 2, however, he has pooped his pants twice and in the bathtub twice, and he will poop in his diaper during naptime. He won't poop on the potty because he doesn't want to hang out there, he pees immediately and then wants right off the potty. I've heard that it takes boys longer to learn to poop on the potty...is this true? Anything I can do to make him hang out on the potty longer and encourage him to poop? Or should I just wait until he's ready, no matter how long it takes?