Trust Nobody

Osas, was embarking on a long trip and decides his wife should wear steel underwear. He locks the underwear and gives the key to his best friend Akpos, saying "If i don't come back in 10 years, set her free." Osas was only 30 minutes into his journey when he sees a cloud of dust behind him. It was Akpos running after him. "What's wrong?" Osas asked. Akpos, still panting, says "You gave me the wrong key!"