Wouldn’t you be intimidated if you saw an ass-naked man charging at you, dong swinging in the wind?

The Insubres and Boii were clothed in their breeches and light cloaks; but the Gaesatae from vanity and bravado threw these garments away, and fell in in front of the army naked, with nothing but their arms; believing that, as the ground was in parts encumbered with brambles, which might possibly catch in their clothes and impede the use of their weapons, they would be more effective in this state.

Polybius’s Histories