Men Yawning More Equals Taking Viagra
A male erection generally needs to be induced by sexual stimulation, including visual stimulation and direct sexual stimulation. The latter generates neural nitric oxide synthase, which promotes an erection. However, yawning is a primitive reflex mechanism that is innate.
Through deep and prolonged inhalation, more oxygen can enter the lungs and reach the bloodstream, promoting oxygen exchange within the body.
During this process, it also prompts the brain to produce nitric oxide. It not only reaches the nerves controlling breathing, protecting the cardiovascular system, but also travels down the spine until it reaches the blood vessels supplying energy to the penis. For instance, when men yawn, there may be a phenomenon of the penis trembling accordingly. It should be noted that drugs like "Viagra" used to treat erectile dysfunction have one function which is to promote the formation of nitric oxide in the body. Therefore, yawning and taking "Viagra" can be said to achieve similar effects, though their efficacies differ.
Therefore, when wives see their husbands distracted and yawning frequently, they shouldn't just complain but encourage them to occasionally yawn more appropriately, which might yield unexpected results. Elderly people generally have decreased sensitivity to visual stimuli; if they consciously yawn more, it can increase the production of nitric oxide in the body, helping with firmer erections.
Of course, everyone should not blindly believe in the effects of yawning but should exercise regularly. During exercise, apart from increasing testosterone and producing nitric oxide, it also strengthens the body. When physical fitness improves, sexual desire naturally rises as well.