Alexander the Great was going Greek centuries before Mohamed stained the earth.
How did they separate the men from the boys in the Greek army? With a crowbar.
Same reason. To the Greeks women were inferior creatures, not suitable for making love with. One loves an equal. Women are for getting what labor out of them one can and for making sons. The arabs are of the same mind and derivatively all Moslems are, with the Turkish Moslems mostly excepted since Ataturk ended polygyny and a middle class developed in Turkiye. Erdogan is making a run at ending the middle class just as Moslem rulers must, just as our own Moslem ruler is doing. Perhaps the Turks will recover some of the old Moslem moral ways. Perhaps not.
Primitive cultures (including the early Greeks) were all about power. Men had herds of wives, or in some cases, such as that of the Jews once they had abandoned polygamy, one wife but several “concubines” for whom they provided. This was all based on the wealth or power of the individual older male.
Sometimes there would be an emotional connection with the woman, and this was actually considered the ideal. The choice of and faithfulness to one wife was considered the ideal in later Greek, Roman and Jewish thought, and using boys for sex was ridiculed in the pagan societies and not permitted among the Jews.
However, Islam brought it all back.