William Masters' Stethoscope

Origin
William H. Masters, along with Virginia E. Johnson, conducted the Masters and Johnson studies of human sexology from 1957 to 1990s. In these studies, the two conducted research into sexual dysfuntions, and created the outline of what would be known as the human sexual response cycle.

Effects
This stethoscope only affects males, and those with male genitalia. Wearing and/or use cures any and all sexual dysfunctions, but the longer it is worn and/or used, the stethoscope will progress the users through the steps of the male sexual response cycle.