Hehe, keep your water up mate, and all those other anti-traffic suggestions.

But I totally get you, once bub is engaged, sitting on the loo, it sure does feel like you could push bub out hey! And it is a similar sensation - similar muscles that get used. A midwife told me she gets many women who insist they need to poo, and she's like um, okay, and ends up catching their bub over the loo - they don't believe it's the baby, cos it feels like they need to poop!

All the best!