Diamond5 wrote:
How exactly would the U.S. have jurisdiction over a U.S. citizen hiring a prostitute in Brazil when everything related to the prostitution occurs in Brazil? There are limits to the power of the the U.S. federal government to impose laws...
The US has states with bizarre sex laws (see graphic below).
The US does have jurisdiction for sex with minors in other countries and traveling across state lines. You can't travel to a country where a certain age is legal which is not legal in the US.
https://i.kinja-img.com/gawker-media/image/upload/s--GR_QSfnT--/c_scale,fl_progressive,q_80,w_800/199p8b0fjtd3djpg.jpg