Does Breastfeeding Cause Loss of Sensation?

I was watching Rachael Ray last week (a re-run) and she had Dr. Lisa Masterson on there answering women's questions. Dr. Masterson is on the show, The Doctors on CBS. She is one of four in lab coats on the show and Dr. Masterson is the only female out of the four doctors.

There was one question new mothers might be interested in so I wrote it down so I could post it here. One new mom, who had just finished breastfeeding, had no sensation left in her nipples for intimacy. It just didn't feel good to her anymore whereas it had before nursing. She wanted to know if it was normal.

Dr. Masterson says that the nipples become callused from all the gnawing and suckling that babies do and that it IS normal. She said that sensation would come back. I didn't have this problem myself after nursing for 26 months but if you have this problem, or are worried about it once breastfeeding is finished, I hope this helps!