What ISIS mentioned is right...lubing the inside of a condom definitely will lead to a slippage. I am not sure about it breaking like that tho. The surface structure (and elasticity) of the rubber has to be comprised for it to tear completely.
Here are some other ways the rubber can be compromised:
- storing your condoms in a hot place, like a glove compartment or stuffed up juicy couture purse.
- using a condom that is past its expiration date (ladies please stop buying the 10,000 bagged condoms from Sam's club. Seriously! Get a monthly supply instead.)
- ripping the condom with your teeth or fingernails while opening the wrapper (Guys r sometimes guilty of doing this in the heat of the moment. Having done this before myself, thank God, none has broken on me!)
- using the same condom more than once (Seriously....do we a refresher course on how to put a condom on. Need I saw more! If something doesn't feel right. Look at it. Or Take it off and use a new one)
My two cents.