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Doesn't tell us what "drugs" it detects though. Most likely GHB. Anyone ever tasted GHB? It's salty as fuck. If you can't taste that in your drink then you deserve to be raped. It's also a controlled drug and really fucking expensive. Furthermore, most women claiming to have been drugged actually are just inebriated (as confirmed by blood tests). This nail polish is a solution to a problem that doesn't exist.

This happens because the circuits used to "think" the word become tired and the nerves depolarise more slowly. kind of like repetitively flexing a muscle. This weakens the connection between the word and its meaning.