Breastfeeding was sometimes hard for me even for my own child, I am not sure I would enjoy nursing other babies. I was tempted once to ask my friend who didn't have milk if she wanted me to give her baby some breast milk but I didn't think she would approve, so I kind of just kept quite. That was the only time I thought of it.
Breastfeeding sometimes made me really cranky. Maybe because my son was eating every two hours for half an hour and I had to work in between, so I was nervous.