I think that my ds got the 'poo' feeling before knowing about wees, but only because whilst still in nappies he started taking himself off to do a 'private' poo eg. crouched behind the sofa, behind a door etc.
You would have thought that this would have made the potty training easier, but it didn't, and he was dry long before he'd sorted the poos out (and we're still not completely there now, 3 months down the line). He is now much better at pooing as the potty is on the floor in the loo, rather than being in the middle of the sitting room for fast access. He really has a privacy issue, even to the extent of telling me he is going to wee, sitting himself down then grunting "Don't look me, mummy" or "Go away now, mummy" which means a poo is imminent, and often I think he prefered to continue to poo privately in his pants, tucked in a corner, rather than face the prospect of a publicly placed potty.
So, for him it wasn't just the sensation, but being confident enough to get his pants down and sit in a place that felt open. Bizarre, I know, but I don't think it's that unusual a problem, and now that I trust him to go into the loo, shut the door and get on with it, we're being more successful