The loudest penis is that of a tiny European species of aquatic freshwater insect. Micronecta scholtzi is a very small water boatman, just 2 mm long, but when it rubs its penis against its abdomen (a process known as stridulation, which serves to attract a mate), the chirping noise created can be up to 99.2 decibels. This is equivalent to sitting in the front row listening to a loud orchestra playing.

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