I guess this is sort of an electric jock strap

1880, an electric “chain” in a belt connected to a “suspensory” for a man’s vitals.

This electrical stimulus was supposed to cure all manner of unspeakably lingering medical tragedies, including spermatorrhea, exhausted vital energy, female complaint, inflammation of the prostate gland, seminal weakness, kidney disease, cramp, lost manhood, paralysis, indigestion, dyspepsia, spinal complaints, nervous debility, and of course the “debilities of sexual self-pollution” (“the sexual sin (which) is the most destructive of all human vices…the greatest outrage against Nature’s sexual ordinances that man can possibly perpetrate”.  

Isaac Pulvermacher’s (which is German for “gunpowder maker”) electrical medico-contraption was popular for several decades in the mid/late 19th century.

Found at Historical Indulgences.