Bad knees may be more of a guy thing

Related: Men's health

1. Men's health
   1. Study: Penis size 'does affect attractiveness'
   2. Meningitis outbreak among gay men worries officials
   3. Testosterone doesn't boost functioning in older men
   4. Sauna visits may lower sperm count
   5. Guys get this disease, too -- but they may not know it
2. Top health stories
   1. Boys with ADHD twice as likely to grow up obese
   2. New sleep pill may be unsafe at higher doses, FDA review suggests
   3. Breast cancer bras a no-go for Victoria's Secret
   4. Sleep-deprived teens cause crashes, study shows
   5. Measles surges in UK years after vaccine scare
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