WHAT'S INSIDE: SEXUAL HEALTH

The Sexual Health Channel explores the functions -- and dysfunctions -- of the reproductive system. Learn about maintaining a healthy sex life and avoiding and treating sexual problems.
  • Male Reproductive System
  • Female Reproductive System
  • Contraception
  • Sexual Dysfunction
  • Sexuality
FEATURED: SEXUAL HEALTH
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As sexology has moved from surveys and self-reporting to laboratory settings, male bisexuality has been caught in the scientific crosshairs. Why do some question its legitimacy as a bona fide sexual identity?

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Do new fathers have lower testosterone than single men?

Superficially, men's bodies remain largely unaffected by their children's births, but that doesn't mean that they're untouched by parenting on a deeper level. How can childrearing affect dads' testosterone levels? And does it make them less manly?

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