A buildup of sexual arousal and stimulation can lead men and women to the intense and pleasurable release of sexual tension known as the orgasm. Having an orgasm may also be referred to as "climaxing" or "coming." During orgasm, the heart beats faster, blood pressure rises, breath becomes quicker and heavier, and involuntary muscle contractions occur in the genitals and often throughout the body. In men, these muscle contractions result in ejaculation, or the release of sperm-filled semen from the penis.
After ejaculation, men generally require a period of anywhere from a few minutes to a few hours or even days before another orgasm is possible. Women, on the other hand, can often experience simultaneous and multiple orgasms within a short period of time, if stimulating activities continue. While it is possible to enjoy sexual activity without reaching orgasm, difficulty reaching or inability to experience orgasm can become a problem for some individuals and their sexual partners that may require the services of a sexual health professional.