How to break a condom

http://arstechnica.com/journals/science.ars/2008/05/21/robo-gigolo-discloses-the-nature-of-condom-failure

Durex scientists built a sex robot to try to figure out why condoms break. The article actually has a picture of it too!

Take note! This is the important part: Their conclusion was the only way to really break a condom is to use one without enough lube. Yet another great reason to use plenty of lube.

The weirdest thing about this article is that it mentioned that they figured out the issue based on condoms that people had returned. What sort of sick, sick person saves a used broken condom and then returns it to the manufacturer? Who the hell are these people?