Sexual arousal though they are generally considered secondary in role to the other three. Erotic stimuli which can result in sexual arousal can include conversation, reading, films or images, or a smell or setting, any of which can generate erotic thoughts and memories in a person. Given the right context, these may lead to the person desiring physical contact, including kissing, cuddling, and petting of an erogenous zone. This may in turn make the person desire direct sexual stimulation of the breasts, nipples, buttocks and/or genitals, and further sexual activity. Erotic stimuli may originate from a source unrelated to the object of
Sexual arousal Response", detailing four stages of physiological changes in humans during sexual stimulation: excitement, plateau, orgasm, and resolution. Barry Singer presented a model of the process of sexual arousal in 1984, in which he conceptualized human sexual response to be composed of "three independent but generally sequential components". The first stage, "aesthetic response," is an emotional reaction to noticing an attractive face or figure. This emotional reaction produces an increase in attention toward the object of attraction, typically involving head and eye movements toward the attractive object. The second stage, "approach response," progresses from the first and involves bodily movements towards