Do you think the above mantra is true (generally speaking I mean, not 100% of the time with no exceptions).
Ignoring the "has it been proven yet?" question, the news story about Christian Horner's controlling behaviour towards someone (who is not his wife Geri) makes me think whenever i see stories like this that having this type of thing in your past is almost always a very clear sign of what you are likely to do in the future. People often fall into the "cheated on" or "cheater" camp without much cross over (I know which one I am in) and often repeat that as a pattern throughout their lives.