I think that it is not right to comment on any individual, since no one knows what transpired in their life.
However I do live in a neighborhood which has a few couples, Some that I actually grew up with.
Some do it out of ignorance, I pitty them.
Others do it to rebel, I pitty them as well.
The way I see it, is that they are throwing away a life of innocents, tranquility and happiness, to a life of of emptiness. A life that is built on trust to a holywood lifestyle which lacks it.