It is more powerful yet less expensive than cocaine, and it lasts up to twelve hours.
Some people use crystal to work long hours.
Others, including people diagnosed with Attention Deficit Disorder during childhood, claim it helps them to finish tasks and concentrate on one activity at a time. The main reason gay and bisexual men use crystal, however, is to heighten sexual experiences. It is possible to have sex or masturbate for hours. Furthermore, it opens the door to sexual activities that people are ordinarily too inhibited to do. Physical Effects Crystal stimulates the central nervous system.