A Gentleman (n.) holds the door open while his wife carries in the groceries.
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A Gentleman (n.) is a man who, when his wife drops something, pushes it to where she can pick it up more easily.
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A Gentleman (n.) doesn't get fresh until the second date.
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A Gentleman (n.) never contradicts a woman, often out of courtesy but more often out of cowardice.
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A Gentleman (n.) never swears at his wife when ladies are present.
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A Gentleman (n.) is one who, when he invites a girl up to see his etchings, shows her his etchings.