If you want to know the cold, hard truth, your man thinks that flowers are a total waste of money. They die after, like, five days. And around Valentine's Day, roses get marked up like crazy! A dozen any other day of the year would cost a guy about $20, but in February, he'll be breaking out more than $50 to foot the bill.
Unless he wants to look like a cheapskate -- which he doesn't -- he'll have to spend a Benjamin or more on a fragrant floral arrangement that'll be tossed out alongside next week's trash.
At least diamonds last forever. But don't get your hopes up: He probably isn't planning to buy you any sparkly rocks, but if he did, you'd still be able to appreciate them (and him) years later. More on that topic next.