Here are the examples:
- Person reveals herpes infection.
- Girlfriend reveals interest in breaking up.
- Mother reveals that parents suspect son is gay.
- Person reveals that she's heard her friend is well-endowed.
Only 4 examples and presumably it doesn't always "work" (that is, reveal information that would otherwise be hidden and not revealed on a survey), but I wonder if this could be harnessed somehow as a survey device.