Sales of condoms spiked in 2009, increasing 22% over the same period in 2008, according to Fast Company. There appear to be a number of factors at play here. On one hand, dangerous times seem to trigger an evolutionary urge to reproduce at a greater rate. And some have suggested that sex gains appeal as cheap entertainment in tough economic times. At the same time, the uptick in condom sales suggests a growing recognition that, when money is tight, we can ill afford to support more children.