Men who suffer from obstructive sleep apnea (OSA), a sleep related breathing disorder, are seeing another potential benefit from continuous positive airway pressure therapy (CPAP) -- improved sexual function and satisfaction in non-diabetic men under 60. CPAP is the most common and effective treatment for OSA, which keeps the airway open and restores normal oxygen levels during sleep. This helps maintain a steady, healthy level of breathing through the night. A study out of Walter Reed National Military Medical Centre in Bethesda, assessed the erectile function (ED) and libido of 92 men newly diagnosed with OSA, who were starting CPAP therapy.