SpoilerVirgin, I think the soap fans you know are definitely not the ones who populate the soap boards on line.
Many of them, at least in my experience on several boards, tend to take their shows way too seriously (IMHO) and some go further, identifying with characters to the point of ripping the actor/actress who plays the character for something the character did. Now that’s over the top in my book.
Yes, I do watch a few soaps (GH and the now gothic PC); and yes, they do tend to glorify cheating. I don’t think that necessarily means that the audience buys into it… well, excepting maybe those fans who are over the edge, as described above. Soap characters do have a tendency, though, to take marriage vows extremely lightly; that’s not something new, though. In fact, imo the major part of the problem with soaps is that they keep recycling the same old storylines that have been around for generations, making only cosmetic changes from time to time. Most of the folks who write for soaps are part of an “old boy” (or girl) network that’s been around forever as well. There’s plenty of melodrama that they could be playing in the 21st century, that’s for sure, but I don’t think they’re really going to get into it, like having major characters in openly gay relationships–there’ve been gay characters, but they’ve been minor and there certainly haven’t been any real relationships portrayed.
Port Charles has seemingly gone completely gothic now, with vampires and the like. It’s not really my cup of tea, frankly, but the show really does have one of the best ensemble casts and I keep watching it. And yes, there is cheating on there. In fact, one male character has fathered several of the children on the show, to the point that I wonder where their “next generation” is going to come from! 
So yes, the soaps do glorify cheating, but I don’t think they’re responsible for making people cheat. In fact, the recent spate of cheating on GH has made it clearer to me that cheating hurts everyone involved. JMHO, mind you.
And I enjoyed the Days of our Lives Christmas show, Corbomite! 