what gene determines whether a person will have male or female genitals?
SRY-1 gene. This gene tells your body how to make a protein known as the testis-differentiating factor (TDF), and production of TDF usually makes the developing embryo follow the male pattern of development
What conclusions did early sex researcher Havelock Ellis come to concerning sexuality that were considered revolutionary at the time?
Ellis argued that both sexes enjoyed sexual activity, not just males, that all sexual orientations were normal variations of sexual attraction, and that sexual orientation was present at birth.
What American pioneered research into American sexuality, starting in the early 1930’s and culminating in the publication of Sexual Behavior in the Human Male and Sexual Behavior in the Human Female?
Alfred Kinsey pioneered sexual research in the United States.
In what way is sex drive in humans different from other drives such as drive for food or water?
Human sex drive is associated with social and pair-bonding relationships and thus goes beyond simply bodily need for orgasm.
Males do indeed think about sex more often than females. Is this sex difference in thinking about basic drives found only in thinking about sex?
No. Males also think more often about sleeping and about eating than females do.
What changes in brain functioning occur during orgasm in males, and what different changes occur in females during orgasm?
Males show stimulation of the ventral tegmental area, the same brain section associated with drug responses. Females show a shut-down of areas in the brain controlling thoughts and emotions.