If you think you are any kind of forward thinking person, you would not be on board with this archaic practice at all.
Also, De Beers invented[1] the concept of diamond-based engagement rings back when diamond jewellery sales were at an all time low, as a business-saving incentive. There zero romance in buying one for your partner.
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[1] https://www.theatlantic.com/international/archive/2015/02/ho...