My point is, you CAN marry when youre 15, if you / your father have the dowry..
It aint make sense for the father to just marry his daughter off to some jobless 15yo men, knowing that there, if the 1st marriage fails, itd be much harder for her to get another husband. If I have a daighter there, itd make more sense to marry her to some rich old men, than a jobless 15 year old just cause he think he deserve a bride.
I once read in somali / sudan (cant remember, was some african country where poligamy is the norm), men are normally married at 30, women at 13, cause the father would get cows as dowry for marrying off his daughter, so its most profitable to marry off the daughter as young as possible, and marry the sons late, jfl.
It cost cows to marry off his sons, so if he marry them late, he gets a more years to profit from the cows milk, before he give them off to the father of his sons bride to be. Men marrying late is probably the norm all over the world, they all just cope with prostitution in the meanwhile idk.
And as a result of this a lot of men there get killed trying to steal cows, jfl.