Gingerbreadgirl I had been looking for this everywhere and now I've found it. It's from an article by Diane Wiessinger (bf expert) about guilt:
Guilt is a concept that many women embrace automatically, even when they know that circumstances are truly beyond their control. (My mother has been known to aoplogize for the weather.)
Women's (nearly) automatic assumption of guilt is evident in their responses to this scenario: Suppose you have taken a class in aerodynamics. You have also seen pilots fly planes. Now, imagine that you are the passenger in a two-seat plane. The pilot has a heart attack, and it is up to you to fly the plane. You crash. Do you feel guilty?
The males I asked responded: "No, because I would have done my best." "No. I might feel really bad about the plane and the pilot, but I wouldn't feel guilty." "No. Planes are complicated to fly, even if you've seen someone do it."
What did the females say? "I wouldn't feel guilty about the plane, but I might about the pilot, because there was a slight chance that I could have managed to land the plane." "Yes, because I'm very hard on myself about my mistakes. Feeling bad and feeling guilty are all mixed up for me." "Yes, I mean, of course, I know I shouldn't but I probably would." "Did I kill someone else? If I didn't kill anyone else, then I don't feel guilty." Note the phrases "my mistakes", "I know I shouldn't", and "Did I kill anyone?" for an event over which these women would have had no control!
The mother who opts not to breastfeed, or who does not do so as long as she planned, is doing the best she can with the resources at hand. She may have had the standard "breast is best" spiel (the course in aerodynamics) and she may have seen a few mothers nursing at the mall (like watching the pilot on the plane's overhead screen). That is clearly not enough information or training. But she may still feel guilty. She's female.