Groping commuters reach for release

The metro's dim lighting and constant motion create a perfect cloak for the exhibitionists and voyeurs who populate its cars. A young man with headphones on watches a woman across the aisle, her legs slightly parted, rubbing her pussy through her jeans. She catches his eye and smiles, pulling her panties aside to give him a better view. A few seats down, an older woman unzips a man's pants, her hand disappearing into his fly as she gives him a surreptitious handjob. The train pulls into the next station, and a new crop of passengers board, oblivious to the secret world of lust unfolding around them.

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