T.S.
I just love it when people say "oh we don't care about being legally married, the paperwork, all that matters is love, etc."
Well you would care if you owned a home, a business, had any savings, retirement or investments, or if you have children or get seriously ill.
Marriage comes with important legal protections and benefits. People who don't get that will have a harsh awakening when a partner gets sick, dies or simply decides to leave.
This is why gay people have fought so hard for marriage equality, not just to be accepted for who they are (though that's certainly part of it) but because they want the same rights as straight couples when in comes to important issues like health care coverage, medical decisions, custody/support, inheritance, taxes, all kinds of reasons.