As psychology and science see it, mating is the entire repertoire of behaviors that animals—including humans—engage in the pursuit of finding a partner for intimacy or reproduction. It encompasses acts from flirting to one-night stands to marriage and more. Some mating behaviors are deeply ingrained, hard-wired into the nervous system, and operate without conscious awareness—attractions, for example—and some, like marriage ceremonies, are highly scripted, with every detail worked out ...| Psychology Today
Stress generally refers to two things: the psychological perception of pressure, on the one hand, and the body's response to it, on the other, which involves multiple systems, from metabolism to muscles to memory. Some stress is necessary for all living systems; it is the means by which they encounter and respond to the challenges and uncertainties of existence. The perception of danger sets off an automatic response system, known as the fight-or-flight response, that, activated through hormo...| Psychology Today