Marriage is not a play ground

Marriage this days are usually decided by either blood group,peer groups, and other factors but the major reason s are the two mentioned most times blood group and genotype, genotype most times are barrier to marriage, check this example if a girl with AS wants to marry a man with AS they will both end up having offspring with with SS which is not good for their future, although they might end up having just one AS but it won't be fair enough,peer group May involve third parties like friends who give bad counsel thereby leading to the end of ones relationship