Portugal's parliament Friday approved plans to legalise gay marriage, less than three decades after revoking the country's ban on homosexuality, but rejected proposals to allow same sex couples to adopt. The bill passed with limited public controversy in what has traditionally been one of Europe's most socially conservative countries. After less than three hours' debate, Friday's parliamentary vote went mainly along party lines, with the left-wing majority backing the measure proposed by Prime Minister Jose Socrates and the right-wing opposition voting against.