10. Infidelity Detection Kit

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We saved the best (or worst) one for last. This kit uses the same technology that’s used by professional forensic laboratories worldwide to detect traces of semen. Nobody likes to think that their significant other is cheating on them, but if you’re wondering, there may be a good reason for it. This kit produces results within five minutes with a substance that turns purple when it comes into contact with any traces of seminal fluid.