Sexual feelings refer to the emotions and physical sensations that arise from sexual desire and arousal. Sexual desire is an emotion and motivational state characterized by an interest in sexual objects or activities, or by a drive to seek out sexual objects or to engage in sexual activities. Sexual arousal, on the other hand, is the feeling of being turned on sexually, which can be triggered by sexual stimulation alone or with a partner, fantasizing or having sexual thoughts, or reading, watching, or listening to erotic materials. Sexual arousal can lead to many physical reactions, such as an increase in blood pressure, heart rate, breathing, and temperature, as well as changes in the genitals, such as an erection or lubrication. Sexual feelings can change for both men and women as they age, and can be affected by physical changes that affect sexual desire, such as erectile dysfunction or vaginal dryness. The stages of womens sexual desire include willingness, desire, excitement, engorgement, and orgasm.