2) perversion, sexual. The Columbia Encyclopedia, Sixth Edition. 2001
...individuals who are naked, undressing, or engaged in sexual activity, as the primary means of sexual arousal. Sexual arousal as a result of physical contact with...

3) priapism. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...painful erection of the penis, especially as a consequence of disease and not related to sexual arousal. French priapisme, from Late Latin pripismus, from Greek pripismos,...

4) cybersex. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...Sexual activity or arousal through communication by computer....

5) fetishism. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...or belief in magical fetishes. 2. Excessive attachment or regard. 3. The displacement of sexual arousal or gratification to a fetish. fetish·ist -NOUNfetish·istic...

6) pornography. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...1. Sexually explicit pictures, writing, or other material whose primary purpose is to cause sexual arousal. 2. The presentation or production of this material. 3....

7) autoerotism. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...1. Self-satisfaction of sexual desire, as by masturbation. 2. The arousal of sexual feeling without an external stimulus. auto·e·rotic (-i-rtik) -ADJECTIVE...

8) G spot. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...and running along the roof of the vagina, postulated to be erectile and to enhance sexual arousal. First described by Ernst G(rafenberg) (1881-1957), German obstetrician...

9) arouse. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...up; excite: The odd sight aroused our curiosity. See synonyms at provoke. 3. To stimulate sexual desire in. To be or become aroused. From rouse, on the model of such...

10) aggression. The Columbia Encyclopedia, Sixth Edition. 2001
...some form of frustration, or it may be instrumental, when it is used to secure a reward. 1Sigmund Freud postulated (1920) that all humans possessed an aggressive...