We're not so hot on the foams, jellies and spermicidal lubes. A lot of people are allergic to them. Spermicide is a detergent. It kills sperm by tearing up their cell membranes. It can also tear up the cell membranes in your vagina. Rips and tears in the vagina can make a woman extra-susceptible to infection by STD-causing pathogens. Research in S. Africa showed that female prositutes were more likely to contract HIV if they had been using spermicide. It was a very scary finding!

So your best bet (next to not having any sexual contact at all) is to use a regular latex condom, non-spermicidal water-based lubricant, and to take birth control pills. Even if you are on the Pill, it is of utmost importance to use condoms as well -- Pills can fail, always have a backup!