Many boys grow up wrestling and fighting—brothers are notorious for this—although it is not gender exclusive. As one gets older, what was a safe activity becomes increasingly perilous for a number of reasons. My experience of masculine behavior is that physical intimidation is often part of the male "vocabulary", likely arising from basic primate behavior, where stronger primates seek to establish dominance over competitors they perceive to be weaker.
But not all individuals who are smaller and weaker are bullied.
- How to navigate being bullied in the teenage years?
What are strategies, practices, and attitudes that can help teens mitigate, disincentivize, and forestall attack, ideally without recourse to authorities, in that many social situations occur outside of school.