Human sexuality is the capacity to have erotic experiences and responses. Human sexuality can also refer to the way someone is sexually attracted to another person - which is determined by their sexual orientation - whether it is to the opposite sex (heterosexuality), to the same sex (homosexuality), having both these tendencies (bisexuality), to all gender identities (pansexuality or bisexuality), or not being attracted to anyone in a sexual manner (asexuality). Human sexuality impacts cultural, political, legal, and philosophical aspects of life. It can refer to issues of morality, ethics, theology, spirituality, or religion. Some cultures have been described as sexually repressive.


The biological aspects of humans' sexuality deal with human reproduction and the physical means with which to carry it out (sexual intercourse).
 
Men and women are anatomically similar except when it comes to the reproductive system and genitalia. Both men and women have different physical mechanisms that enable them to perform sexual acts and procreate. Both men and women react to sexual stimuli in somewhat of the same fashion with only minor differences. Women have a monthly reproductive cycle and the male sperm production cycle is more continuous.

The brain is the structure that translates nerve impulses from the skin into pleasurable sensations. It controls nerves and muscles used during sexual behavior. The brain regulates the release of hormones. It is believed the physical origin of our sexual desires.