That does not sound so different to the way relationships work where I am from. Some function without the use of romance.

[A pause. It has indeed been explained to death and she's getting a run-down of this odd-sounding 'marriage' thing from Angelo, but the idle question she asked initially has now given rise to a good few more.]

However.. I do think that humans look upon their relationships with others in a different way to what I am accustomed to.. It is interesting to hear about it.