Erotica (from the Greek ἔρως, eros “desire”) is any artistic work that deals substantively with erotically stimulating or sexually arousing subject matter. All forms of art may depict erotic content, including painting, sculpture, photography, drama, film, music or literature. Erotica has high-art aspirations, differentiating it from commercial pornography. Another category is amateur pornography which includes non-commercial works.
Stimulation: to make (something) more active : to cause or encourage (something) to happen or develop. : to make (a person) excited or interested in something.
Sexual arousal usually begins in the brain. That is, your brain responds to a sexy thought or image, or having a feeling of closeness or affection toward a partner, or the touch of a partner by sending signals to the rest of your body, especially the genital area. For both men and women, one of the major components of physical sexual arousal is increased blood flow to the genital area causing the clitoris to swell and harden in women and the penis to become erect in men. Also, for both women and men, the heart beats faster, blood pressure increases, and breathing becomes more rapid. So in some basic respects, the process of male and female sexual response is quite similar. But because males and females have different reproductive organs we need to look at how sexual arousal affects the genital area separately. http://www.sexualityandu.ca/sexual-health/understanding-sexuality/sexual-arousal-and-orgasm