I don't know if anyone else reads Cosmo but in this month's it gives a warning as well.
"If your condoms and lubricant feature a spermicide called nonoxynol-9 on the ingredients list, trash them. Sure, this chemical does what it promises--it kills sperm. Problem is, recent studies point out that it also cna cause inflammation of delicate vaginal tissue, which in turn can leave you more vulnerable to STDs.
"Spermicide is basially detergent, so it makes sense that it can do some damage," explains Anne E. Burke, MD, assistant professor of obstetrics and gynecology at the John Hopkins University School of Medicine, in Baltimore."