You surprise yourself by kissing them. Against your better judgement, perhaps, or in a sudden defiance against your habitual distancing mechanisms. For a moment, distrust evaporates. Perhaps they are as surprised as you. Love lost is resurrected for that pure moment, chaste and hungry. It's been over, or it hasn't begun, and in a second the wall comes down again. For that little slice of eternity, you are both divorced from history, married only to each other's souls.