"When sex isn’t magical, then sex shouldn’t happen. And when it is magical, its power shouldn’t be underestimated. The energy exchange between two people making love is far more significant than rationalists think. That is why we can become so deeply vulnerable to someone once sex has taken place. The question is whether someone has the personality structure to contain the power of last night’s behavior, the morning after and the morning after that. This where women often start getting overactive and men start wimping out. All of this is why, without some kind of commitment to the larger relationship, making love can be so emotionally risky."