OK Falah, can you explain whether a husband has to get his wife's permission to have sex with her?

Does a master have to get his slave's permission to have sex with her?

The Crusades turned into campaigns of slaughter, rape, and pillage...
http://www.aish.com/jl/h/cc/48950796.html

...Marching beyond Nicæa, a French contingent ravaged the countryside. They looted property, and robbed, tortured, raped and murdered the mainly Christian inhabitants of the country, reportedly roasting babies on spits...

...the women had been murdered in their tents, pierced through the belly by lances. Time and time again Muslims who surrendered were killed or sold into slavery. This treatment was applied to combatants and citizens alike: women, children, the old, the infirm — anyone and everyone...

...At Albara the population was totally extirpated, the town then being resettled with Christians, and the mosque converted into a church. Often, the Christians offered to spare those who capitulated, but it was an unwise Muslim who accepted such a promise. A popular technique was to promise protection to all who took refuge in a particular building within the besieged city. Then after the battle, the Christians had an easy time: the men could be massacred and the women and children sold into slavery without having to carry out searches. Clerics justified this by claiming that Christians were not bound by promises made to infidels, even if sworn in the name of God. At Maarat an-Numan the pattern was repeated. The slaughter continued for three days, both Christian and Muslim accounts agreeing on the main points...The Christian account describes how the Muslims" bodies were dismembered. Some...were cut up to eat. The Muslim account mentions that over 100,000 were killed...

...When the crusaders captured Jerusalem on the 14 th July 1099, they massacred the inhabitants, Jews and Muslims alike, men, women and children. The killing continued all night and into the next day. Jews who took refuge in their synagogue were burned alive. Muslims sought refuge in the al-Aqsa mosque under the protection of a Christian banner. In the morning crusaders forced an entry and massacred them all, 70,000...

...The Temple of Solomon was so full of blood that it came up to the horses" bridles. The chronicler Raymond of Aguiliers described it as a just and wonderful judgement of God. Even before the killing was over the crusaders went to the Church of the Holy Sepulchre "rejoicing and weeping for joy"...Muslim prisoners were decapitated, shot with arrows, forced to jump from high towers, or burned. Some were tortured first. Neither was this an isolated incident. It was wholly typical. When the crusaders took Caesarea in 1101, many citizens fled to the Great Mosque and begged the Christians for mercy. At the end of the butchery the floor was a lake of blood. In the whole city only a few girls and infants survived. Soon afterwards, there was a similar massacre at Beirut. Such barbarity shocked the Eastern world and left an impression of the Christian West that has still not been forgotten in the third millennium...

...in addition to his abilities as a military leader, Saladin is renowned for his chivalry and merciful nature. It is known, for example, that in his struggles against the crusaders, he provided medical assistance on the battlefield to the wounded of both sides, and even allowed Christian physicians to visit Christian prisoners. Once the battle to retake Jerusalem was over, no one was killed or injured, and not a building was looted. The captives were permitted to ransom themselves, and those who could afford to do so ransomed their vassals as well. Many thousands could not afford their ransom and were held to be sold as slaves. The military monks, who could have used their vast wealth to save their fellow Christians from slavery, declined to do so. The head of the Church, the patriarch Heraclius, and his clerics looked after themselves. The Muslims saw Heraclius pay his ten dinars for his own ransom and leave the city bowed with the weight of the gold that he was carrying, followed by carts laden with other valuables. As the prisoners who had not been ransomed were led off to a life of slavery, Saladin's brother Malik al-Adil took pity. He asked his brother for 1,000 of them as a reward for his services, and when he was granted them he immediately gave them their liberty. This triggered further generosity amongst the victorious commanders, culminating in Saladin offering gifts from his own treasury to the Christian widows and orphans. As a contemporary historian has remarked, "His mercy and kindness were in strange contrast to the deeds of the Christian conquerors of the First Crusade".

In contrast to the generally honourable behaviour of the Muslims, the Christians repeatedly made promises under oath and them reneged upon them, often with the encouragement of the priesthood. In 1188 the King of Jerusalem, Guy, who had been captured by Saladin, was released. Guy had solemnly sworn that he would leave the country and never again take arms against the Muslims. Immediately, a cleric was found to release him from his oath. Despite this sort of behaviour, Muslim leaders generally stuck to their own promises. They were rather bemused by the cynical behaviour of the Western Christians. Often the cynicism worked to the Muslims" advantage. For example, Saladin was pleasantly surprised to find that Italian city states were prepared to sell him high quality weapons to be used against crusaders.

When the Emperor in Constantinople heard of the Muslim victory, he sent an embassy to congratulate its leaders. Eastern Christians had already generally allied themselves with the Muslims, regarding them as fairer and more civilised rulers than the followers of the Church of Rome. Now they asked to stay in Jerusalem, were allowed to do so, and gave "prodigious service" to their new masters.

http://www.medievalwarfare.info/crusades.htm