I think the key is getting a couple of good experiences with it, whatever it takes. With my daughter, I was really aware of the times of day she was likely to go -- usually about 20 minutes after a meal was a good bet. Offer plenty of fiber to keep him as regular as possible. Then when it's a typical time for a BM, find something to entice him to sit on the potty and stay there -- books he likes, something he's only allowed to hold if he's sitting on the potty (for my daughter who's a bit quirky, it was my chapstick). Most likely he'll end up going while on there if he's distracted long enough... Then make a HUGE deal of it... call your significant other if you have one, or his grandparents, or do something special. Once this has happened a couple or few times, I'd bet he'd start letting you know he has to go (my daughter didn't tell us on purpose, but she'd get this look on her face and then say "lipstick" lol.
at 2:00 PM on Feb. 10, 2010