You have some lazy friends who constantly send you voice messages. But often, you can’t listen to them right away because you’re at work, or you’re surrounded by people.
The next time someone sends you a voice message, just press the Play button and hold your phone close to your ear. The recording wouldn’t play on loudspeaker, but in the earpiece (like a regular phone call).
This option is so undiscoverable, isn’t it? 😉