They reported more sexual pleasure when they thought it was the woman touching them than the man, and this was reflected in their MRI scans with greater arousal of their somatosensory cortex. They were either watching a video of a woman touching their thigh or a man touching their thigh. Thighs In 2012, the California Institute of Technology measured brain responses in heterosexual males as they were having their inner thighs touched whilst being MRI scanned. Nipple stimulation may trigger uterine contractions, which then produce a sensation in the genital area of the brain. In women, one study indicated that sensation from the nipples travels to the same part of the brain as sensations from the vagina, clitoris and cervix. ![]() The research suggests the sensations are genital orgasms caused by nipple stimulation, and may also be directly linked to "the genital area of the brain". Research using brain-scanning technology found that stimulating nipples in women resulted in the activation of the genital area of the sensory cortex. Furthermore, 51.7% of men reported that nipple stimulation caused sexual arousal, and 39% said that it enhanced their existing arousal. Sexual stimulation of a nipple Nipples One study administered a questionnaire about sexual activity to 301 participants and found that 81.5% of women reported that stimulating their nipples caused or enhanced sexual arousal and that 59.1% of them asked to have their nipples stimulated during sex. The nipples, thighs, lips, and neck can all provide sexual stimulation when touched. There are many areas through which a person can be sexually stimulated, other than the genitals. On the night before a lady's wedding, a local holy-man would come and break her hymen with a large stone dildo, a ritual also used to confirm the virginity of the bride. In Persia, it was thought that the blood of the hymen was unclean, and should be avoided by husbands. These were used because wealthy Chinese men would often have too many wives to please. ![]() Ancient Chinese dildos were made of bronze or other metals and some were hollow allowing them to be filled with liquid to simulate an ejaculation. The Romans created double-ended dildos for use with a partner. The ancient Greeks created their dildos from a carved penis covered in leather or animal intestines to create a more natural feel. It is known that dildos were used for fertility rituals, however. Historians are uncertain whether these have been used for religious rituals or for personal pleasure. Dildos were also made of camel dung and coated with resin. There have been dildos found from the Palaeolithic era, made of Siltstone and polished to a high gloss. ![]() Sex toys have been used as a source of sexual stimulation for thousands of years. They can be exciting and provide new types of stimulation that the body cannot produce, such as vibrations. They can be used by someone on their own, with partnered sex, or group sex. The purpose of sex toys is to provide pleasure and stimulation through an alternative route than just using people's bodies. A person may also become aroused by simply touching another person, though the bulbocavernosus reflex itself is triggered by stimulation of the glans penis or clitoris. Arousal is triggered through sensitive nerves in these body parts, which cause the release of pleasure-causing chemicals ( endorphins) that act as mental rewards to pursue such stimulation. Masturbation, erotic massage, a " handjob" and " fingering" are types of physical stimulation involving the genitals. ![]() Physical sexual stimulation consists of touching the genitals or other erogenous zones.→ Some people practice orgasm control, whereby a person or their partner controls the level of stimulation to prolong the experience leading up to orgasm. Stimulation can be by self (e.g., masturbation) or by a sexual partner ( sexual intercourse or other sexual activity), by use of objects or tools, or by some combination of these methods. Sufficient stimulation of the penis or clitoris usually results in an orgasm. The term sexual stimulation implies stimulation of the genitals, but may also include stimulation of other areas of the body, stimulation of the senses (such as sight or hearing) and mental stimulation (e.g., reading or fantasizing). Although sexual arousal may arise without physical stimulation, achieving orgasm usually requires it. Sexual stimulation is any stimulus (including bodily contact) that leads to, enhances and maintains sexual arousal, and may lead to orgasm.
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