Evolutionary theory promotes the concepts of promiscuity and lust,
pointing out that the quest to produce many offspring is a main goal of
organisms under Darwinism.
Description does not imply promotion. Mistaking "is" for "ought" is
the naturalistic fallacy. The theory of evolution no more promotes
promiscuity and lust than germ theory promotes getting infectious
diseases.
Solving a problem works best if you first understand the source of the
problem. Creationists, by denying sources of behavior, are less likely
to deal with behavioral problems effectively.
Further Reading:
Wright, Robert. 1994. The Moral Animal: The New Science of Evolutionary
Psychology. New York: Pantheon.