Pubic lice, crab-shaped insects which suck on the blood of hosts that most often make their home in pubic hair, have been with humans for thousands of years. But an increased focus on hair removal has curbed cases of lice dramatically. In Australia, Sydney's largest sexual health clinic has not seen a case of pubic lice among women since 2008, according to Bloomberg.
"It used to be extremely common; it's now rarely seen," Basil Donovan, head of sexual health at the University of New South Wales and a physician at the Sydney Sexual Health Centre, told Bloomberg. "Without doubt, it's better grooming."