My belief, reinforced by twenty years of practice, is that in the course of establishing security, many couples confuse love with merging. This mix-up is a bad omen for sex. To sustain an élan toward the other, there must be a synapse to cross. Eroticism requires separateness. In other words, eroticism thrives in the space between the self and the other. In order to commune with the one we love, we must be able to tolerate this void and its pall of uncertainties.