from a wound. Love (amor) is merely an elaborate cultural posturing that obscures a glandular condition; love taints sexual pleasure just as life is tainted by the fear of death. Lucretius is writing primarily for a male audience, and assumes that love is a male passion, directed at either boys or women. Male desire is viewed as pathological, frustrating, and violent. Lucretius thus expresses an Epicurean ambivalence toward sexuality, which threatens one's peace of mind with agitation if desire becomes a form of bondage and torment, but his view of female sexuality is less negative. While men are driven by unnatural expectations to engage in onesided and desperate sex, women act on a purely animal instinct toward affection, which leads to mutual satisfaction. The comparison with female animals in heat is meant not as an insult, though there are a few traces of conventional misogyny in the work, but to indicate that desire is natural and should not be experienced as torture. Having analyzed the sex act, Lucretius then considers conception and what in modern terms would be called genetics. Both man and woman, he says, produce genital fluids that mingle in a successful procreative act. The characteristics of the child are formed by the relative proportions of the mother's "seed" to the father's. A child who most resembles its mother is born when the female seed dominates the male's, and vice versa; when neither the male nor female seed dominates, the child will have traits of both mother and father evenly. Infertility occurs when the two partners fail to make a satisfactory match of their seed after several attempts; the explanation for infertility is physiological and rational, and has nothing to do with the gods. The transfer of genital "seed" (semina) is consonant with Epicurean physics and the theme of the work as a whole: the invisible semina rerum, "seeds of things," continually dissolve and recombine in universal flux. The vocabulary of biological procreation underlies Lucretius's presentation of how matter is formed from atoms. Lucretius' purpose is to correct ignorance and to give the knowledge necessary for managing one's sex life rationally. He distinguishes between pleasure and conception as goals of copulation; both are legitimate, but require different approaches. He recommends casual sex as a way of releasing sexual tension without becoming obsessed with a single object of desire; a "streetwalking Venus"—a common prostitute—should be used as a surrogate.