Drinking coffee can be refreshing and helpful. Don't overdo it.

For example, when a person feels groggy, drink a cup of coffee or black tea, and the mood is immediately refreshed, because caffeine in its composition stimulates sympathetic nerves. Simply put, the sympathetic nerve is responsible for all activities during the day. Stimulating it restores energy and makes everything more lively.

Looking at it from another angle, it is equivalent to suppressing parasympathetic nerves. Since sympathetic nerves and parasympathetic nerves belong to the relationship between the surface and the inside, when sympathetic nerves are active, parasympathetic nerves, which are weaker than sympathetic nerves, are suppressed. Parasympathetic nerve function night physiology, erection and so on and sex related parts, due to excessive caffeine intake, will have a negative effect on sex.

The autonomic functions of sympathetic and parasympathetic nerves are precisely because many people do not know that regulating autonomic nerves is one of the keys to sexual ability. Rather than miss some of the widely available but useless ways to fortify men, it's better to really learn what works here.

Therefore, the usual emotional ups and downs, sympathetic easily excited people, especially before sex, it is best not to drink caffeinated coffee and other drinks. So as not to suppress parasympathetic nerves, reduce libido.

Of course, this varies from person to person. Tired at night has been wanting to sleep, even sex can not be done, in the evening may wish to drink a cup of strong coffee, its refreshing effect will continue into the night, so that you can successfully carry out sexual intercourse. Make your wife or girlfriend happy. The important thing is to take advantage of caffeine's refreshing effect, and everyone uses it differently.

But there are limits to everything. American famous sexual medicine expert Ruili? McAllister stressed that drinking coffee before sex should not exceed two cups, otherwise it will lead to sympathetic over-excitation, it is difficult to produce a relaxed, happy mood, and the good mood of sex may be replaced by anxiety. More importantly, excessive consumption of strong tea and coffee can lead to difficulty falling asleep and affect night sleep due to their diuretic effects.