'So surreal': Couples reflect on 20 years of same-sex marriage in Canada / Watch: 'I do', say Thai couples as country legalises same-sex marriage / First same-sex marriages in Thailand set it apart from much of Asia / Same-sex couples now live in 99.5% of US counties, study finds / In China, a woman's custody battle spotlights challenges facing same-sex couples / One woman's custody battle highlights the challenges facing same-sex couples in China / Documentary honours 20 years of same-sex marriage in Ontario / Study: Same-sex marriage in 20 years had no negative effects / Q&A: These researchers examined 20 years of data on same-sex marriage. Here's what they found