Reply #: They need a good example to explain the 10%

[LiberalFighter]

Maybe a computer program that would allow the user to stop the selection of the leaky condom.

Have all participants at a computer station and when they pick the leaky condom a light would start flashing. They could then see how many of them would end up being pregnant or being fathers. Sometimes that 10% would be higher because some groups or areas would have a higher tendency.