At Rutgers University, the rates of infection of students with STD varied little with the form of contraception used. It is significant to note that condoms, the hero of the safe sex message, provided virtually no protection from STDs. While it is better than nothing, the bottom line is that condoms cannot be trusted. A study from Florida looked at couples in which one partner was HIV positive and the other was negative. They used condoms as protection during intercourse.
Condoms are inherently untrustworthy.
The FDA allows as many as one in 250 to be defective. Condoms are often stored and shipped at unsafe temperatures which weakens the integrity of the latex rubber causing breaks and ruptures. There are just so many pitfalls in condom use that you just can't expect immature teenagers to use them properly. And even if they do, they are still at risk. Studies are beginning to show that school-based sex education that includes condom use as the central message, does not work.