I admint that the probability of that happening is very very low, but 'history' clearly states it has already happened with a human around 2000 years ago, so I would never say it was impossible

And yes I am just playing devils advocate, but I have some gay friends who have been in relationships longer than some of my straight friends, why should they not be allowed to be married after they have proved they are in a commited lasting relationship but my straight friends can have a nice Christian church wedding after only knowing each other a couple of weeks just because they are able to reproduce with each other?????