研究學者另外歸納出一個結果：看A片較久的人，腦中對於神經反應刺激的獎勵機制，和對性刺激反應的活躍區塊，會變少。也有研究指出，長時間看A片的人，性慾容易處在較高峰狀態，但面對有關性的刺激物時，不管是圖片或影片，神經系統的反應都較少。许多色

Thick massive cock stuffs pussy of attractive lady in uniform! JK black silk! Footjob in stockings at the end of the credits! "You may request her out following watching the opening movie!" fourteen min本站基於資訊安全以及保護網站內容價值等因素，對於使用未經認證之機器人、爬蟲程式等非自然人為訪問行為�

Pornhub gives you endless free of charge porn video clips with the most well liked adult pornstars. Get pleasure from the most important amateur porn Group on the web together with whole-length scenes from your best XXX studios. We update our porn videos day by day to 成人影片 ensure you usually get the best website quality sexual intercourse m

Pornhub provides you with endless cost-free porn films with the most popular Grownup pornstars. Delight in the biggest newbie porn community on the net as well as full-length scenes through the leading XXX studios. We update our porn video clips everyday to make sure you constantly get the highest quality intercourse motion pictures.本站基於資

Pornhub provides you with endless no cost porn videos with the hottest Grownup pornstars. Appreciate the most important beginner porn Neighborhood on the web together with full-size scenes from the top XXX studios. We update our porn movies everyday to make sure you usually get the highest quality sexual intercourse flicks.本站基於資訊安全�