Why is my galaxy s3 randomly talking to me?

Your Galaxy S3 may be randomly talking to you due to the Voice Assistant or TalkBack feature being activated. This can happen accidentally if you press a specific button combination or if the accessibility settings were enabled. You can check and disable this feature by going to Settings > Accessibility and turning off Voice Assistant or TalkBack. If the issue persists, consider restarting your device or checking for any software updates.