DEAR MISS MANNERS: My husband is an excellent cook and usually prepares and serves most, or all, of the meal when we invite people over for dinner. I participate in a variety of ways, including finding recipes, making suggestions about the menu, and doing some chopping or stirring, depending on what we are making. I also tidy up the house beforehand and set the table. Surprisingly (to me), when guests leave, they often thank my husband for the dinner but not me, as though I am not one of the hosts. I think that it would be more appropriate for guests to thank both of us. Also, I wonder if it w…