Earlier quoted context omitted.
I went through this not that many years ago buying a ring for my SO. My biggest mistake was including her in the decision. She described what she wanted exactly– nothing gaudy or ostentatious, just a singular, tasteful stone on a plain band. Couldn't be simpler, could it? Finding stones that met her criteria was easy. Some were natural diamonds, some lab grown, many moissanite. From the outset, she said the meaning o…
Look at it as a proof of work. What matters is you burned a certain chunk of your life for her.
For humans, it's, "I have excess resources I can afford to burn according to the socially-accepted ritual or test, so when you bear my offspring, you can be sure I will also have excess capacity to provide for both you and your offspring."
A female may have second thoughts about choosing you as a mate if you appear to cheat at the test or don't do the test right.