This book shows that scientific explanations fall short of providing an exhaustive explanation of the dynamics of erotic perception. It furnishes portraits from Sartre, Merleau-Ponty, Levinas, and Irigaray that help us understand the ethical, ontological, and religious dimensions of the pleasure, pain, hostility, shame, immodesty, tenderness, caring, and playfulness that compose erotic perception. The final portrait in the book portrays erotic perception as a challenge to existence. This portrait shows that the discernment of the other as sexually significant gives rise to wonder, excitement, agitation, and trouble. The totality of existence is disturbed as we are faced with a decision about venturing to care for the other's existence.