In the dimly lit, velvet-draped clubs of France, anonymous couples seek thrills unseen in the daylight. The air is thick with perfume and pheromones as strangers introduce themselves with a glance, a touch, a whisper. Clothes are shed, inhibitions discarded, as bodies entwine in the dark corners. Moans echo, lost in the throbbing bass of the music, as couples indulge in the oldest dance of all.