I found the link from the ACS to share with you, and I think it is worth reading for the content that it does offer.
However, the problem with the issues involved (sexuality, as well as dietary influences) is that prior to treatment a patient unfortunately doesn't have the background info to know that there are actually questions that
need to be asked. The patient has no particular reason to believe or know that the provider is deliberately not providing essential information about the proposed therapy in regard to those issues :
Talking with Your Doctor:
http://www.cancer.org/docroot/ETO/et...yourdoctor.asp
AlaskaAngel