As a CEO, this situation is more than complex. There are times when you are working with 'partners' or anyone in the same industry. And you can not avoid collaborating with each other. Apple needed Google, as much as Google needed Apple.<p>However then there is the ugly part, since your partners are in the same industry, they are ultimately your competitors too. It's not about laws or specific rules. It's about human nature, you will be less pissed if someone hooked up with your Ex, but things could be entirely different, if your Ex is hooked up with one of your friends.<p>This is perhaps not a smart analogy, but it's somewhat relevant, remember a time when Eric was on Apple board, and then they went on to launch Android? It certainly leaves a bad taste in the mouth and incites a war.