Paid for my ex’s glasses and decided to spend a little extra for an engraving

Yeah... and about a second or so with a tool and a minute of polishing and the engraving can be easily removed without a Trace more or less. But it’s your money I guess so if whatever it cost was worth the 60 seconds or less your ex might spend removing that unless they just don’t care (in fact some people would think it’s funny and keep it as an ice breaker- so you might have just helped get your ex his next... he can make up any clever story he wants about it.)