father-in-law JAV

[aklifaal]

i've noticed that this genre is very popular among the native japanese audience. the average scenario basically goes like this; father lives as a neet with his son and his bride under the same roof, his son goes off to work to support his aristocratic lifestyle and he cucks his son by fucking his wife (quite often ends up impregnating her too)

what is the reason for this? why is it so popular? does the average japanese man have daddy issues?