For want of a better word but hopefully ykwim.
Based on my sample size of 4 (doubt if there is research on this) I have noticed British men marrying Mediterranean/Asian women and then experencing v different marriages than their friends with UK wives. The 4 in question are quite mysogynistic in general but the way they treat their wives, I cannot imagine as many ethnic British women putting up with. They are almost slaves, chained to the house, do 100% housework/childcare ( and none of these men work long hours/ have commutes). They have lots of hobbies, wives have none. Car is for their sole use. Etc etc.
So, I have started to think: have these men deliberatly sought out these 'submissive' wives? Is this just a blip in ppl i know or part of a wider trend?