I don't know why some people bring religion everywhere .If most of the population of the world follow their religion strictly the world would become heaven.Most of us don't even get control over anger , cruelty, greed, jealousy,etc.
According to me marriage is a bond of love and duty between two persons.If two persons of same sex want to live with each other and can have sexual pleasure what is the problem for society.
Many women in many countries are being raped , that is crime,forcible sex is always crime .