

It gives us certain rights and protections, tax benefits, etc. Hospital visitations, legal stuff, the ability to get in your own queue for immigration, and it’s a sign to each other that you both are committed to each other for the long haul. It’s a sign of trust.
I recently read A Fire Upon the Deep and it’s sequel, The Children of the Sky, and this picture is very fitting with those books (they feature a lot of sentient wolves)