Category:Old men in the 2000s

 See also category: Old women in the 2000s.

1. Babies (male) (birth–23 months)
2. Boys (2–12 years (pre-pubescent))
3. Adolescent boys (13–17 years)
4. Men (18– )
   • Young men (18–39 years)
   • Middle-aged men (40–59 years)
   • Old men (60+ years)

Definitions come from, but are slightly modified from, the Physical stages of human life as found at Wikipedia:Human development (biology).