Right. You can also look at it as a type of hack ... an emotional hack, if you will. It tends to work well with men. It is similar to the cliche teachers use: "you will never amount to anything". The idea is you will get so angry, you will self-motivate just to prove them wrong. The army also uses these tricks in boot camp.

A good leader will figure out a priori which techniques work with which people and apply them appropriately.