University of Texas Psychologist David Buss writes:
I have never thought that female sexual psychology was simple. But I've changed my mind about the magnitude of its complexity and consequently revamped the scope and orchestration of my entire research program. I once focused my research on two primary sexual strategies -- long-term and short-term. Empirical work has revealed a deeper, richer repertoire: serial mating, friends with benefits, one-night stands, brief affairs, enduring affairs, polyamory, polyandry, sexual mate poaching, mate expulsion, mate switching, and various combinations of these throughout life. Women implement their sexual strategies through an astonishing array of tactics. Scientists have documented at least 34 distinct tactics for promoting short-term sexual encounters and nearly double that for attracting a long-term romantic partner.Researchers discovered 28 tactics women use to derogate sexual competitors, from pointing out that her rival's thighs are heavy to telling others that the rival has a sexually transmitted disease. Women's sexual strategies include at least 19 tactics of mate retention, ranging from vigilance to violence, and 29 tactics of ridding themselves of unwanted mates, including having sex as a way to say good-bye. Some women use sexual infidelity as a means of getting benefits from two or more men. Others use it as a means of exiting one relationship in order to enter another. When a woman wants a man who is already in a relationship, she can use at least 19 tactics of mate poaching to lure him away, from befriending both members of the couple in order to disarm her unsuspecting rival to insidiously sowing seeds of doubt about her rival's fidelity or level of desirability.
That is a line of scholarship that could make a researcher paranoid.