Testosterone is the hormone produced in your testes, a.k.a. your balls. What makes a man a man? Testicles.
Therefore, in order to become more manly or more masculine, you must increase the testosterone in your body.
To naturally boost your testosterone, lift insanely heavy weights at the gym, using your legs, spend more time in the natural light in the natural sun, talk to pretty girls and boys, chat with strangers, walk around a lot, sleep 8 to 12 hours a night. Also stop drinking alcohol and stop smoking weed.
Also consume more organ meats.
To naturally increase your testosterone, consume more cholesterol, like beef liver, or beef ribs, beef neckbones, beef brisket etc., abstain from alcohol weed and drugs, and starches and sweeteners.