Good news is... thats nonsense!

It's helpful if you have inverted or flat nipples to pull them back out before your baby arrives for a good latch.
If you and baby are doing it right then it will be 100% comfortable.
I would look through the bestfeeding thread, which I'm currently searching for and cant seem to find, will get back to you. We've all posted awesome links and videos that have been helpful.
Also familiarize yourself with la leche league, they are so super helpfull (and free!) and the only authority on bf'ing if you ask me.
www.llli.org/southafrica.html
So many people struggle with bf'ing because of bad advise in hospital.
We'll be here if you need help too!
Anyway, I'll get back to you with that thread!
I did so much reading on BF'ing before hand as I was also super worried, I would seriously rather recommend you do some research rather than pulling at your nipples.. My midwife also told me to do this, I didn't and didn't have any problems.