I think it's a good idea or a Christmas song. Granted,it's not about the spiritual side of Christmas but it's a great song for couples who for some reason can't be together on the hoidays. (Like husbands or even working vives who travel on business.)
I think it could even be as simple as one 1/2 of them has to work so much,not far from the home,but away from it enough that they are missed and they wish they could see there significant other more.
Christmas is about togetherness after all,along with all the rest that it stands for.
So,you can also see why it's in the top ten of my fav. GL songs.