Below you will find some links to help you better understand Klinefetler Syndrome. They can be very beneficial and helpful, please feel free to look over them.
http://www.nichd.nih.gov/health/topics/klinefelter_syndrome.cfm
http://klinefeltersyndrome.org/
http://www.nlm.nih.gov/medlineplus/klinefelterssyndrome.html
http://ghr.nlm.nih.gov/condition/klinefelter-syndrome
http://learn.genetics.utah.edu/content/disorders/whataregd/klinefelter/