Why Do Guys Use Boku?

Although technically ぼく is used to address someone equal or lower to you, you can think of boku as a gentler, semi-formal pronoun alternative. This is why it's one of the first first-person pronouns Japanese boys learn and commonly use.

Can men use Boku?

For example kids in high school would use this when talking with friends. Where as boku is the midle formality and the most common "I" for men, in day to day use.

Do men use Watashi or Boku?

In formal or polite contexts, “watashi” is gender neutral. However, when it's used in informal or casual contexts, it is usually perceived as feminine. “Boku” is used by men and young boys.