Coitus can scarcely be said to take place in a vacuum; although of itself it appears a biological and physical activity, it is set so deeply within the larger context of human affairs that it serves as a charged microcosm of the variety of attitudes and values to which culture subscribes. Among other things, it may serve as a model of sexual politics on an individual or personal plane.
Kate Millett (2016). “Sexual Politics”, p.23, Columbia University Press