Oh come on, they are impossible to resist. You will never be happy in a healthy relationship, not for long anyway, especially if your first boyfriends were all very, very bad.
Let's define good as being healthy, and healthy as prolonging life.
Why prolong a boring life.
How unhealthy is that?
Why would someone willingly put themselves through the pain that bad boys bring though? Doesn't that negate the point of the survival of the organism when there are other ways of having excitement in your life?