Sexuality According to Biology

Our sex isn't incidental to who we are – it is essential. Every cell, even the smallest strand of DNA, reveals whether we are male or female. Men and women are different biologically, mentally and spiritually. They share the same human dignity, but they move through life and react to people and their environment in different ways. Each sex has a particular genius in the way it complements the other. Men are generally bigger and stronger; they are built to protect and provide; their thinking tends to be more linear and narrowly focused; and they tend to be problem solvers and task oriented. Women are built for nurturing; they are softer, more receptive; their thicker corpus callosum (which bridges the two hemispheres of the brain) enables them to efficiently multi-task; and they excel at taking care of relationships. These differences (and this just skims the surface) are both fascinating and significant.


The hedonistic, narcissistic and relativistic attitudes toward sex has often sought to minimize the differences between men and women in our culture. Radical feminists disdain and repress their femininity (especially their fertility, maternity, sensitivity, and receptivity), seeking instead strength and power. Men, whose masculinity has been slowly eroded by females who have undermined their natural strengths, end up confused. Women have told them to agree that a woman can do any job (even frontline warfare or the priesthood) that a man can do, but then are offended if he doesn't open the door for her.

The cultural attitude toward sexuality has lead many to completely disregarded biology as insignificant. The physical realities and basic biological requirements of sexual union are rejected as hedonistic desires take over.   For example, the belief that we have a right to get what we want has led couples struggling with infertility, believing that they have a right to a child, to pursue in vitro fertilization, surrogacy and other methods of conceiving that ignore the biological requirement of sexual intercourse.

  • The culture denies the procreative aspects of sex, promoting control of fertility. The biological fact is that getting pregnant is a biological effect of sexual intercourse. 

  • The culture denies the definition of marriage between one man and one woman. The biological fact is that it takes a man and a woman to conceive a child. 

  • The culture wants to diminish the unitive aspects of sex, substituting 'pleasure' for 'union.'  The biological brain science of neurochemicals released during sex demonstrates that peaceful, fruitful union can only be experienced within the context of a marriage relationship.

Next:  These biological realities illuminates deep truths about sex.