Do happy people cheat?

Sadly, this has been known to happen. Even if people may be happy in relationships there are a lot of factors that contribute to their own feelings of inadequacy; this often causes them to seek validation elsewhere. Like what I read in the article entitled: "Why do people cheat even if they're in a happy marriage?" http://ph.theasianparent.com/why-do-people-cheat-even-if-theyre-in-a-happy-marriage/