One type that the religion declares harmful and another type that defies nature.
The harmful sexual intercourse that the religion prohibits is in grades, some are worse than others. Temporarily prohibited sexual activity is less dangerous than those totally prohibited. For Instance, sex is disallowed during the Fast, Ihram, Itkaf, menstruation, and so forth. There is no punishment prescribed when one violates this type of limited prohibition. The second type, which is totally prohibited, falls under two categories, prohibited for eternity, such as marrying whom one is not allowed to marry, which is one of the worst types of illegal sexual activity. This category requires capital punishment according to a segment of the scholars, such as Ahmed bin hanbal. There is an authentic Hadith that upholds this ruling too. The second category is totally prohibited but not for eternity, such as committing adultery or fornication with whom one is theoretically eligible for marriage. In this case of adultery, it will be violating two rights: Allah's right and the husband's right.
If the woman was forced to this act, it will be a violation of three right (Allah's, her husband's and her own). If she had a family and relatives, they will be ashamed by the rape, and thus a fourth right would be violated. if the woman was not allowed for the man even theoretically, a fifth right will be violated. The harm of this type of act varies according to the grade of prohibition it violates.
There is a type of sexual activity that is harmful for one's nature, whether due to the form or the manner it takes. For instance, having excessive sexual intercourse will weaken the strength and harm the nerves. it will In addition cause convulsive shaking, facial paralysis and spasms. It In addition weakens the eyesight and the rest of the powers of the body, along with weakening the instinctive heat and energy, widening the body vessels and exposing them to accumulating harmful substances.
The best time to have sex is after the food has been digested in the stomach, but not when the stomach is empty for it weakens the instinctive heat. Ina addition, one should not have sex when he is full, because in this case sexual intercourse cause clogs, nor when one is tired, after taking a bath, after vomiting or when one is nervous, sad depressed distressed or very happy.
The best time to have sex is after the night falls, especially when food is digested. One then takes a bath or ablution and sleeps.