As of now, same-sex marriages are legal in Massachusetts.
In states and countries where same-sex marriages are legal, they work (or fail to work) exactly the same way opposite sex marriages do. They have the same legal requirements, and grant the same benefits and impose the same obligations.
No. Same sex marriages were not legal in Jamaica in 1945.
Yes and no. Same-sex marriages legally performed in other countries are legally recognized in countries where same-sex marriage is legal. In countries where same-sex marriage is not legal, foreign same-sex marriages are not legally recognized.
No. There is no legal recognition of such marriages in Chad.
No. There is no legal recognition of such marriages in Egypt.
No. There is no legal recognition of such marriages in Estonia.
No. There is no legal recognition of such marriages in Indonesia.
No. There is no legal recognition of such marriages in Kosovo.
No. There is no legal recognition of such marriages in Kyrgyzstan.
same-sex marriages are legal in ALL Canadian provinces.
On some islands. Effective April 21, 2010, same-sex marriages performed in the Netherlands are recognized in Aruba, Curacao nd Sint Maarten. Effective January 1, 2011, same-sex marriages legally performed anywhere are legal in Bonaire, Saba and Sint Eustatius. Effective October 10, 2012, same-sex couples may legally marry in Bonaire, Saba and Sint Eustatius. A kind of same-sex civil union called PACS is legal in Guadeloupe, Martinique and Saint-Barthelemy since 1999. In other places in the Caribbean, there is no legal recognition of same-sex relationships.