Why don't more same-sex couples get married in Canada (or another country that allows it)?

Ok, so The Daily What has a post about two men who want to get married before one gets too far into dementia to get married. And while only they can answer why, if they want to get married so badly, they don’t just head up to Canada for a ceremony, it does seem to happen a lot. Tons of same-sex couples seem to be waiting for their states to legalize it instead of going to another country – which I understood more when the only country was the Netherlands, but Canada’s just a few hours on a plane away for most of the U.S. So why don’t more people go get married in Canada? Why don’t you and your same-sex fiancée go up to Canada?