I find that I have only one DIL that always writes a thank you even though it is an email. The others don't. So this one is the one that gets the "I'm just thinking of you" gift. Everyone gets a birthday gift. This year we aren't exchanging Christmas gifts, but the "I thought of you when I saw this" gift just seems to go to the one that says "Thank you." Strange how that works, isn't. It pays to have good manners and to be appreciative.