A vacuum erection device helps draw blood into the penis by applying negative pressure. During the late 16th and 17th centuries in France, male impotence was considered a crime, as well as legal grounds for a divorce. Surgery on the spinal cord, prostate, bladder, or pelvis can lead to impotence by damaging essential nerves, tissues, muscles, or arteries.
If the stamp is no longer in place by morning, it means that a nocturnal erection occurred. Given the advances in medicine and nutrition research, however, it is no longer a scary thing. This type of device is sometimes referred to as penis pump and may be used just prior to sexual intercourse.