Hirose's feed

°Is is alright to have a relationship even though you are siblings in a Yaoi manga?
° What if its full/half blood-related?
° What if its not blood related?
° Are these kind of manga's immoral and breaks the moral family conduct in order to savour the fantasies of every reader?
And lasty...
° What do you feel whenever you finish incestuous yaoi manga?

Thank you for answering my questions(▰˘◡˘▰)