Women have a monthly reproductive cycle, whereas the male sperm production cycle is more continuous.
The hypothalamus is the most important part of the brain for sexual functioning.
Some argue that sexuality is determined by genetics, while others believe it is molded by the environment, or that both of these factors interact to form the individual's sexual orientation. In the former, one assumes that the features of a person innately correspond to their natural inheritance, exemplified by drives and instincts; the latter refers to the assumption that the features of a person continue to change throughout their development and nurturing, exemplified by ego ideals and formative identifications.
Evolutionary perspectives on human coupling, reproduction and reproduction strategies, and social learning theory provide further views of sexuality.
The four important sexual hormones are oxytocin, prolactin, follicle-stimulating hormone, and luteinizing hormone.