Instinct urges men to procreation, which brings into existence a new occasion for suffering and death
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

““as we blow out a soap-bubble as long and as large as possible, although we know perfectly well that it will burst.” There is no such thing as happiness, for an unfulfilled wish causes pain, and attainment brings only satiety. Instinct urges men to procreation, which brings into existence a new occasion for suffering and death; that is why shame is associated with the sexual act. Suicide is useless; the doctrine of transmigration, even if not literally true, conveys truth in the form of a myth. All this is very sad, but there is a way out, and it was discovered in India.” source