Once I was participating in a "physical training exercise" which was 'combatives' (fighting), where we essentially tried to force one another to submit (give up) via fighting without striking (punching/kicking) one another. The guy I fought was a lot stronger than me and choked me pretty hard for a long time before I tapped out. My face was in tears, involuntarily, and very red (this dude had me in a pretty good choke for a long while) when I got up and I literally got shit for it (having tears) every single day for months. More than a year after I got ridiculed still by these people for "crying", when all I did was simply keep fighting until the very point I couldn't anymore.

The one thing, as a guy, you do NOT want to be is "a bitch", if I had given up 45 seconds before I was 'crying', I likely would have saved myself a significant amount of time being made fun of, looked down on, etc. I "lost" by trying my best for too long.

This is one example I have of many more, but I hope you can see how stupid it can get as a man.