Never heard of an Adam and Eve Christmas theme. Or is that supposed to be some Polynesian thing going on, although that's hardly native dress. The best interpretation I can put on that disturbing scene is that they were nudists, a holiday pic intended for their nudist friends perhaps, and the kids were used to seeing Mom & Dad naked. But then I notice the tan lines... Very creepy.
I don't know WHAT to make of the tire & wheel -- it's not even clean. I mean, if you're gonna pose with a car wheel, at least don't use a dirty one. A reminder of how & where the conception took place? Why is she naked, but he dressed?
"Dear, I hate to interrupt your labor, but do you think you could go out into the garage and put this on the Honda? I'd do it myself, but I'm already dressed for the office and running late. Pretty please?"
"I know I'm just a sentimental fool, but if it's a girl let's name her 'Michelin' or if a boy we'll call him 'Bridgestone,' so we'll never forget being stranded all night with a flat tire, nine months ago."