DS is fascinated by watching Daddy pee. He pees gleefully in the bath each night before sitting down. But he is obsessionally private when having a poo - says, "go away!" to everyone who goes near him and runs off somewhere discreet (this is a hassle if he decides to do it in a small shop...) he's actually very good about finding us afterwards and saying he's done a poo, can we change his nappy (on occasion he will have taken his trousers and pullups off already), but he was appalled and very distressed the one time we sat down and tried to coerce him into using a potty instead.
He knows poo goes down the loo as we've always flushed his before binning the nappies. He's perfectly aware of when he's going to poo or pee. He just doesn't want anyone near him when he does it, and thinks pooing and peeing is something you do alone and either in pants or on the floor (he's perfectly good with that!). He's 2.7.
Help?