That's a myth perpetuated by the Village People.

In the navy
Yes, you can sail the seven seas
In the navy
Yes, you can put your mind at ease
In the navy
Come on now, people, make a stand
In the navy, in the navy
Can't you see we need a hand
In the navy
Come on, protect the motherland
In the navy
Come on and join your fellow man
In the navy
Come on people, and make a stand

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You don't need a weatherman to know which way the wind blows - Robert A. Zimmerman