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Best Answer: Alcohol or ethanol affects the human nervous system by inhibiting signals between the brain, nerve endings and spinal cord. When people drink, their bloodstream absorbs the alcohol and nervous system functions slow down dramatically--this is the buzz or numbness people commonly feel after drinking.
A couple of drinks can loosen inhibitions, allowing people to explore their sexuality in a relaxed manner. However, alcohol can also impair sexual functioning. Alcohol is a depressant. It works on the nervous system by slowing down brain function, breathing and pulse. The effect is often psychologically stimulating, since emotions and desires flow more freely.