Concerning '''homosexuality and parasites''', anal sex can be an important risk factor for intestinal parasitism.<ref>http://www.springerlink.com/content/jx13231641717w48/</ref> | Concerning '''homosexuality and parasites''', anal sex can be an important risk factor for intestinal parasitism.<ref>http://www.springerlink.com/content/jx13231641717w48/</ref> |