Here is another secret: for a lot of women, pushing feels like you have to poop reeeeeeeeeeeeeeeeeeeeeeeeally badly. (Sorry to be crass, but it's the truth. It feels like a bowling ball.) A lot of those same nerve endings are firing. If you have an unmedicated, undirected birth where no one is telling you what to do, pushing will NOT be a choice -- you body will do the work for you.