It is morning now, I am more coherent. Geek hat on:

With STIs as well as pregnancy, measuring the actual tranmission rates is more helpful than measuring condom breaks. This has been done: HIV, HPV. It would seem that condoms are actually more effective at preventing HIV transmission than they are at preventing pregnancy. Condom break figures are just estimates based on one thing or another.

Also, on lying outright (warning: may inspire more tears).