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Dartos muscle

A muscle in the scrotum that tenses to help regulate the temperature of the testicles when it is cold.

Death-grip syndrome

A condition in which the penis loses sensitivity or it becomes more difficult to orgasm due to consistent masturbation using an excessively tight grip.

Delayed/impaired ejaculation

A temporary or chronic condition in which a man requires an extended period of sexual stimulation in order to achieve an orgasm.


A firm belief in ideas or facts that are objectively untrue.


A set of symptoms that affects an individual’s memory, thinking and social abilities in a way that can impair their ability to carry on with normal daily life.


A mood disorder that negatively affects the way an individual feels, thinks and handles daily activities.


A chronic condition in which the body does not properly convert food into energy.

Digital rectal exam

A routine exam in which a physician inserts a lubricated, gloved finger into the rectum to check for abnormalities that could be a sign of cancer or other conditions.

Dihydrotestosterone (DHT)

A male hormone that plays a key role in prostate growth and development.

Dilation and curettage (D&C)

A two-step surgical procedure in which the dilation of the cervix is followed by the removal of tissue through the use of suction and surgical instruments; the procedure is used for surgical abortion as well as to treat certain uterine conditions.


A class of drugs, often referred to as water pills, that are designed to increase the amount of water and salt expelled from the body as urine.


A neurotransmitter that acts as a motivation mechanism in the brain’s reward system, regulating decision-making and impulse control.

Double (bilateral) mastectomy

A procedure in which both breasts are removed entirely, though in some cases the nipples may be spared; used as a treatment for breast cancer or as a risk-reduction strategy for women at high risk of breast cancer.

Dupuytren’s contracture

Abnormal scar tissue that impedes the ability of a finger to straighten.


A condition that causes pain before, during or after intercourse; it can be a result of physical or psychological factors.