A notice from your friendly pragmatist.
Just a reminder to be careful regarding the potential for mix-up regarding foreign age of consent laws. That in some countries the age of consent is lower [shudder] than in most states in the U.S. should not give the traveler seeking commercial sex abroad less reason to be concerned, but more...
Now I won't put my morality into this other than to say I hope we will all consider the well being of the young and do nothing to harm any person not old enough to fully understand what they are doing. That said, in countries where the age of consent is lower than most of the U.S. they will not feel obligated to make sure you, the U.S. traveler, is complying with U.S. laws regarding engaging in commercial sex abroad with what constitutes someone under the federal age of consent [age: 18]. They'll quite happily let you do what their locals do without second thought toward potentially setting you up for nasty business at home once you get back.
You can be prosecuted in the U.S. for what you do abroad, so be careful and stay within the U.S. laws as these federal crimes carry steep penalties.
If you are unsure Google U.S. Code, Title 18, Chapter 117, SubSection 2423 and, most particularly, "The Protect Act of 2003".
Be careful.