Is It Cheating?

Cheating-it is such a provocative word and we all instantly have an image in our minds as to what it is.As an erotica author cheating is a theme in many stories, but over the years I have discovered that we all have such different views on what cheating actually is.Some people think cheating is kissing, others don't see oral sex as cheating.I introduce some real life examples - is it cheating?