When your baby is latched on well, if there are no other medical or anatomical or supply issues, breastfeeding should not be hurting and your baby should be spending a majority of his time at breast nutritively sucking or what I also like to call power nursing. You have also heard me say: it is not so much of importance on how long they are at the breast, but it is also important to note what they are doing at the breast. Is a majority of their time at the breast actively feeding with great interest or is most of the time spent in a sleepy, lackluster behavior.