We'll take someone else's word for this one: in All the Fine Young Cannibals (1960), a film which we hear is so bad that one just can't sit through it, Robert Wagner's wingwang can be seen to visibly wigwag through the fabric of his trousers.
Source: wiktionary
“This man —I can’t tell you his name — has thick black hair growing on both sides of his wingwang.” She stopped and blinked. “There, I said it.”
“Goodness, gracious, sake's alive! His penis?”
“Yep.”