There are two things there Laura. Once a man starts bearing a woman, he doesn’t stop,it becomes a habit, Secondly the woman spites the man with annoying words, like ,no be beat you go beat me?,you are used to beating me,oya beat me,you no get shame!!
And there are some women who enjoy sex after the beating.
They like it rough.
Sometimes what causes the fight is when the man comes back drunk in night, and he will like to have some fun, and the woman refuses, na there wahala dey.
But after all is finished, they make up, and the cycle continues.
Some don’t want to leave because of the children, others because of thier religious beliefs, and others for economic reasons.