Ah, you've all discovered the "I'm having a dinner party diet"! (I got verbose)
How could it be called a diet when high calorie, fat-laden delicious ingredients are used? Because we clobber ourselves cooking them, bend over backwards and do hand stands getting the complex and wonderful foods to the table (all our guests see is a flip of the hand and hear "oh, it's nothing") with exquisite presentations and seemingly-perfect timing.....then we are so exhausted by the whole ordeal we cannot, don't even want to, EAT.
Has it ever happened to me? You take a guess.
Why are we such masochists? Because we really do love to cook, because we love and need the kudos to feed our cooking passions, because we know we picked a difficult menu and need to climb that mountain, to scale it and reach the summit even if it hurts doing it. Because its THERE.
When I plan a dinner party I do so around my guests. I don't pick a menu then pick the guests. I pick the guests then plan the menu because I usually know the people and how broad their food tastes are. I like to take them to the edge and sometimes even a little further but I do NOT waste my time by serving exotic or difficult fare to people that will not understand or appreciate it. Maybe that is the key. Know thy guests. The only thing that bothers me is being surprised by a dislike- I always ask beforehand if there is an ingredient that is NOT enjoyed or that someone is allergic to- and if I have done that and am confident that I sidestepped the unwanted ingredients, I expect everyone to eat what I fix them. I abhor finding out that there is yet another thing (usually the main ingredient I fixed) someone does not eat for some reason. That drives me crazy.
Over the years I learned not to work so hard trying to please people. A valuable lesson is to know that your friends will be as thrilled with a good lasagna or basic roasted chicken as they would be with a complex and tricky multi-level dish with two sauces made at the last moment.
My personal thrill is to try out new recipes (even make them up on the spot) for dinner parties and have someone tell me it was the best dinner they ever ate. It is what I strive for. It actually happens once in a while. I love it when people enjoy home cooking- especially people that eat out a lot.
No matter what I cook though, I still usually don't eat much at my own parties. By the time it gets on the table I am tired of seeing it, smelling it, serving it....but I weigh less the next morning!