DeaconPeach
Beer me
I feel like that would be very rare. A lot of women get pain from breastfeeding so it may be people that get off on pain or have a skewed pain/pleasure threshold.
I have heard of women whose breasts were really sensitive while breastfeeding, but sensitive in the orgasmic way, not painfully sensitive. Probably in the minority of women, but evidently not as uncommon as you'd think.