No, no guilt at all. I do still think about how awkward I felt singing happy birthday at a b-day party for the first few times. Strange.
I've been to several Thanksgiving dinners with my wife's family. They're Catholics and for some reason they've never prayed before the meal. Well last year for some reason my wife's aunt suggested that they prey. It didnt bother me but I had to call her out on it and ask why all of a sudden after 8 or 9 years that we should all of a sudden have a Thanksgiving prayer. She said "does that bother you?" I replied "No, not at all. Im just curious about the reasoning behind it?"....but I digress.