It's difficult to put into words without sounding glib, the fact that during childbrith you "lave your dignity" at the door. There are many things we have ALL worried about dignity-wise before labour (looking your best, hair being done, toenails painted, bikini lines waxed, whether you will poo or wee, whether you will make strange noises!!!)
All I can say is that giving birth is the most primal thing you'll probably ever do (other than how you probably ended up in the predicament in the first place!
) You don't have to try to give yourself over to the experience because mother nature does that for you. You do retreat within yourself, and your body takes over. I know it sounds ridiculous to you now to hear everyone saying "you don't care" and possibly afterwards you WOULD feel embarassed knowing - but because everything else involved in this situation is an emotional rollercoaster, a very beautifully intimate experience at the same time, and with such a HUGE reward at the end of it, I can promise you that these comments will all make sense once the deed is done.
And yes - I pooed with DD1 despite having such an ENORMOUS poo beforehand I thought I would be safe - but didn't to my or DHs knowledge with DD2 despite NOT having the evacuation previously!
I didn't know about it though. Too "within" myself to notice.
BTW - that's why birthplans are also important. Because you need your DH and the midwife to know your feelings on certain things, because you might not be able to vocalise at the time. And your DH might be practising backrubs, massages, and breathing techniques with you but my DHs main role was to do the smalltalk with the midwife when I couldn't speak anymore! Just moo-ing!