In the sultry Brazilian streets, a 'corno' - a cuckold - finds solace in the taboo. 'Piroca', a slang term for penis, becomes a philosophical muse as he watches, unseen, another man's 'viado' - gay man - pleasure. The corno's eyes widen as the viado's thick, veiny 'piroca' disappears into a willing, eager mouth, then plunges into a tight, waiting ass. His own 'piroca' aches, tenting his shorts, as he struggles with his voyeuristic lust and the philosophical conundrum of his arousal.