There's an easy warmth between these two that builds the moment they meet, turning a first appointment into something far more inviting. Slender blonde Polly Yangs arrives in a white off-shoulder puff-sleeve top and red shorts, backpack on her shoulder and a handful of flyers in hand, drawn in by an offer for a private yoga class. As Sandra Shine's erotic lesbian film "Private Session" begins, she is welcomed at the door by Kate Quinn, a graceful brunette whose ponytail and white tank top with pink shorts suit her relaxed confidence. Kate's bright smile puts Polly at ease at once, and settled on the plush pink sectional, they chat happily as the afternoon sun spills across the loft. Then they move to the mat, Kate guiding Polly through partnered stretches with attentive, hands-on care. Each gentle adjustment brings them closer, until the practice softens into tender embraces and a slow, lingering kiss that belongs to them alone.