After some theological debate it has been (accidentally) discovered that Finnish Lutheran priests can in fact marry same sex couples as soon as the Finnish law is updated.
This was discovered through a loophole... You see, a while ago a Finnish celebrity (really rich guy who spends a lot of time in the tabloid headlines) got married in a church despite the fact that neither he, nor his new wife, are members of the church. Which goes against the rules. But in the aftermath it was decided that the marriage is still valid, which is an important detail. The conclusion was that the church can punish priests who violate their rules but they cannot "undo" the marriage even if they afterwards discover that (although legal according to the laws of Finland) the marriage violates some rules of the church.
And there are priests who have already said that they are willing to marry gay couples so, as soon as the government finishes changing the law, things are going to get interesting.