As you may know, "fragile masculinity" is something that gets laughed by some people. People don't realize that this so called "fragile masculinity" is the byproduct of societal pressures on men to be as masculine as possible (Not show emotions, not do anything remotely feminine, etc). Instead of treating this issue, people just laugh at it like its some kind of joke. Laughing at this "fragile masculinity" is just like laughing at young women who have poor mental health from trying to conform to unrealistic beauty standards. Imagine laughing at these kind of women and calling it "fragile femininity", it would be an obvious example of sexism.