Sexual arousal disorder is characterized by an inability to become aroused and maintain sexual excitement despite adequate sexual stimulation. For most women, this problem occurs after a period of experiencing normal sexual arousal. Typically, when a woman becomes aroused, her body will respond physically (vaginal lubrication and genital swelling) and experience mental and emotional excitement. Sexual arousal disorder is when this arousal response doesn't occur as expected. It may be that the desire is there, but the body or mind (and sometimes both) don't respond. Sexual arousal disorder can happen because of emotional, physical, and behavioral (for example, alcohol and tobacco use) reasons. Emotional discord in a relationship, depression, stressful situations, and fear of intimacy can all play a role.