I second, third, whatever — all the comments about possible oversupply and block feeding, even expressing and ounce or two before putting him on the boob so he gets
more of the hindmilk.
Let your baby stay at the first breast until he slows down or stops sucking, which will give him
plenty of hindmilk (the high - fat, creamier milk).
The
amount of hindmilk your baby gets on the second side depends on how long your baby nurses on that side.
Mom gets sore nipples because she has to break an often strong suck and the baby gets lots of foremilk and not a
lot of hindmilk.
That's because the foremilk can digest too quickly, without the
fat of hindmilk to slow it down, resulting in malabsorption and intestinal distress, not to mention frequent feeding (and sore breasts!)
Since your breast milk doesn't change into hindmilk until a few minutes into the feeding, if you have an oversupply of breast milk it's better to let your baby fully drain one breast to get
some of the hindmilk before switching over to the other breast.