Dương vật bị xìu sau khi quan hệ là do đâu?

nếu ko thế thì "làm tình tới chết" à... :D
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You may know the refractory (bướng, khó bảo; dai dẳng, khó chữa) period as the thing that keeps you from getting an erection (cương cứng) again for a little while after having an orgasm (cực sướng). But is it also the only thing keeping you from death (chết) by sex?

The refractory period is the “recovery phase” (giai đoạn hồi phục) after orgasm, “during which it is physiologically impossible for a man to have additional orgasms,” says says Dr. Kien Vuu, Concierge Performance and Longevity M.D., Assistant Professor of Health Sciences at UCLA, and author of Thrive State: Your Blueprint for Optimal Health, Longevity, and Peak Performance. The phase begins immediately after orgasm, and can last anywhere from a few minutes to several hours in men, depending on a variety of factors, including age and health.

Aside from those basics, however, much about the refractory period remains something of a mystery (kỳ bí), including the exact biological mechanisms (cơ chế sinh học) behind it and its reason for existing in the first place. Recent research appearing to contradict (mâu thuẫn) a widely held theory linking the refractory period to the production of a hormone called prolactin has only further obscured (mờ mịt, không rõ nghĩa, tối nghĩa) the great refractory mystery, bringing a slew of other theories to the surface. One of them, according to Susana Valente, a Ph.D. student who collaborated on the paper published last month in Communications Biology, suggests that the refractory period functions as a survival mechanism to prevent men from wearing themselves out, perhaps fatally (chết người). “It’s important to have a mechanism that inhibits sexual drive,” Valente told Discover magazine. “To not die of physical exhaustion (kiệt sức).”

Tags: sex

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