2 Answers

  1. Do not forget that the human body also produces sounds: the beating of the heart, the pulsation of blood vessels, the work of the gastrointestinal tract. Most likely, what you hear is the pulsation of the vessels of the head.

  2. I think it's because you close your eyes and your brain can better process information from other sense organs, such as your ears. When you close your eyes and kisses become more pleasant, and sex, and food and alcohol.

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