An overwhelmingly large number of men are concerned about the size of their penis even though what they have is more than enough for them to be great in bed.

尽管很多爷们裤裆里那玩意儿的大小其实并无碍于他们在床上的良好表现，可他们都很在意，且有此观念的男人其数量还大得惊人。

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Closer examination of the animals' anatomy revealed that the sea slugs had a large part of their penis coiled up in a spiral inside their bodies, which they would then use to replenish their missing part.

BBC: Sea slug's 'disposable penis' surprises