There is no rare case men experience sexism...males experience sexism as much as women experience sexism...
Men and women can commit the same exact crime and have the same exact criminal record and men will receive a harsher sentence.
Males are disciplined more when it comes to education.
Males do almost all the dangerous jobs and account for almost all the workplace deaths...
Males experience sexism but they are simply considered part of the male experience...and men don't have the collective identity consciousness that women have and any establishment of that consciousness will lead to charges of sexism against women.
You're generalizing. I'm talking across the board from economics to education, men are less prone to sexism to women and at the very least, men are less likely to report it or even say anything about it.