Penises shown in munich
German men have bigger penises than the Brits
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Description: Sign up for exclusive destination guides from the trendjetter bi-weekly digital magazine. The researchers first analyzed samples from the penises of 12 men who were planning to get circumcised. From age 25 on, sensitivity starts to decline. Read the full disclosure policy. Liu says that she would expect to see some variation in the kinds of bacteria found on men in other parts of the world.