Is it Nationality or Sexuality? I did not see this much coverage for any issue related to nationality.
Legalizing unnatural behaviour would be an attempt to make it natural. Some people who would have hesitated will now be tempted to explore.
Will there now be a demand for reservation in jobs? As of now they are in minority. Should such couples be provided tax benefits as they will help keep the population in control?
After 10 / 100 years the count of such people will be much more and so will be considered a natural behaviour.