In general, lines are there for a reason: for security, for clarity. If you choose to cross the line, you pretty much do so at your own risk. So why is it, that the bigger the line, the greater the temptation to cross it? We can’t help ourselves, we see a line we want to cross it. Maybe it’s the thrill of trading the familiar for the unfamiliar, a sort of personal dare. Only problem is once you’ve crossed, it’s almost impossible to go back. But, if you do manage to make it back across that line, you find safety in numbers
Grey’s Anatomy