There were same-sex marriages in ancient Egypt society and Mesopotamia society according to the archeological findings and some literatures.It seems that same-sex marriages were respected by people in the early Roman society.Forbidding same-sex marriage was related to the fact that Rome converted to be Christian.Lesbian was not forbidden strictly after fifteenth century

some novels called them as "Boston marriage".Modern homosexual activity originated from America in 1970

homosexual people begun to claim the right to marry

which provoked extensive controversy.People against same-sex marriage hold the opinion that same-sax marriage could not be defined by traditional marriage concept.On the other hand

people who agree with same-sex marriage think that only can same-sex marriage can deal with the discrimination on social security and equality.