Why can't anyone stay faithful anymore?

I'm not talking about just guys or girls but in general.

It seems there are more and more friends or questions about their SO cheating on them. What is the thrill of cheating?

I know many people who have been cheated on and it keeps growing.

Why do you think people cannot stay faithful to their partner?

What does this mean for marriage? Does marriage mean nothing to anyone anymore?

Or even saying "Yes, s/he is my bf/gf"

I recently read a blog where a female was getting hit on by a guy, who still had his wedding ring on. WTF?
Why can't anyone stay faithful anymore?
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