How do you tell if a girl wears thongs?

As an educator, I must emphasize the importance of respecting others' privacy and personal boundaries. It is not appropriate to try to determine what undergarments someone is wearing without their consent. It is essential to focus on building respectful and healthy relationships based on trust and communication rather than making assumptions about someone's clothing choices. If you have any concerns or questions about appropriate behavior, I recommend seeking guidance from a trusted adult or counselor.