Solo male travelers face a different risk mix than they expect: fewer harassment concerns, but they are the preferred targets for certain scams, and overconfidence is the real vulnerability.
Confrontation is the second theme. In many cultures, male-to-male aggression escalates faster than at home, and alcohol plus a perceived insult, sometimes as small as prolonged eye contact or attention to someone's girlfriend, starts real trouble. Swallowing pride and walking away is the experienced traveler's move everywhere.
Also know the local rules that bite men specifically: public drunkenness is criminalized in some countries, nightlife districts often have areas locals themselves avoid, and drug purchases abroad carry penalties that ruin lives. Stay measured, stay polite, and solo male travel is statistically very kind to you.