This is absolutely true. My wife was entirely happy with any sort of token of our marriage and engagement, being entirely confident of how special she is to me. There are women out there who do not care, just want to feel special. Some people react against a trend like buying diamonds and see NOT receiving one as a sign of how profoundly different and special they are. Oddly too, we both come from very low income families, so the over-compensating effect did not manifest. Everyone is different, all reasons for explaining something like a desire for diamonds never apply to everyone.