You can't ask a man to be stereotypically "manly" if he isn't and I'm going to bet there is a laaaaaarge amount of men out there that aren't.
Manliness is fake, it's all fake and if some guy is acting all tough bro like then I would assume he's probably closeted in some form.
If you want to go by "real men", then they're the most stealth at all not needing fancy male clothes or stereotypes to reassure themselves.
Edit:
No, why of course I'm not bitter at all...
