Edit: I wanted to add a couple sources for my claims above. Once people stopped believing raw sex was an existential threat they started going nuts, falsely believing that everything else can just be cleared up with a pill. Let me also say that my SO worked on the front lines of public health for almost a decade so I might have a unique perspective on this issue because of what she experienced as part of her job.
http://www.cnn.com/2017/03/01/health/syphilis-newborns-partn...
http://www.huffingtonpost.com/entry/std-rates-in-the-us-rise...
http://www.ocregister.com/2017/01/26/syphilis-up-412-gonorrh...