StaceR: The probability is there, it always will be.

The difference is that some trust their control over their temptations, therefore can risk to be more open and expressive in a certain way. Others are emotionally weak, and cant fight the temptation, even if they want to.

So solution is simple, if a person feels that things might get out of control, don't risk it. Kill the very temptation right there and then. Others, who are emotionally strong, and can come out of situations without getting hurt, can afford the risk of flirtation.