Why do men have fragile / toxic masculinity?

I'm going to speak from my own experience, my boyfriend was quite sexist and macho and for example he couldn't wear a t shirt if it had pink on it. Several months ago he lost his job, and I took advantage of this situation to require him to dress like a woman every day, and of course to maintain the house while I work. His behavior has improved. but I wanted to know why men have so much problem with their masculinity
Why do men have fragile / toxic masculinity?
Why do men have fragile / toxic masculinity?
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