For many, body hair presents a number of things they'd rather be free from. This may simply be an aesthetic they seek, a remedy for those who are prone to ingrown hair, or a very long step in a journey to fitting better into their own bodies.
Electrolysis uses a burst of electricity at the root of the hair. This heats the cells producing the hair and causes them to die.
The reason to choose electrolysis is that it is the only FDA approved process for permanent hair removal. Once a hair is electrolysed it will never return. And that is reassuring for many.