NGS & PT - Table for Two (7:40-Min Video)

What exactly are NerdyGirlSocks and PTEMSQueen getting up to under the table?

For nearly eight minutes, the two tease and play with each other’s feet in mismatched crew socks. They tap their toes together, gently rub and press their socked feet against one another, and keep the playful back-and-forth going while the camera captures everything from below.