You would think that they know, but a majority of the men really don't pay attention to the little details (I'd give it a 1-5 ratio for men lol). So, please accept the gifts that you get with a smile, and have a plan set up for next year so that he knows exactly where to go and what to buy lol.
Women don't know what to buy either. All the neckties I've got are gifts from women. The only one I ever wear is the one I bought myself, and that's about once a year.