These web site links contains the valuable information and are great resources:

http://en.wikipedia.org/wiki/Disability

http://web.info.com/infocom.us2/search/web/Disabled?CMP=2768anditkw=Disabled

http://www.sexualhealth.com/channel.php?Action=view_subandchannel=3andtopic=71

http://www.bcm.edu/crowd/national_study/SEXFUNC.htm