An abnormal condition variously characterized by stupor, stereotypy, mania, and either rigidity or extreme flexibility of the limbs.It is most often associated with schizophrenia.
When we cry, our top lip starts to wobble and so this gave rise to the idiom a stiff upper lip, meaning to not show your feelings when you are upset, even though it is difficult not to.
Boys are held to absurd, rigid norms of masculinity --told to renounce the feminine emotionality of sadness or fear and to embrace aggression and anger as markers of real manhood.