Normal is different to different people.In some families taking liquor by ladies is not concerned normal , a man doing so is normal , whereas a father or a uncle molesting a girl is kept a secret just so that the family name and honor remains intact...Ours is a nation of double standards , so we need not bother about these so called "normal" people.What is relevant is a few points
1, First of all Sexual preference is a very personal matter
2, Criminal activities are far more dangerous than gay or lesbian marriage rights and we see criminal tendencies rampant in our society.
3, Gay and Lesbian marriage once legalised will take its own course, as to who will be the father and who will take the role of mother or whether they are going to do away with any role definition is something they will decide for themselves...