I may be really naive on the definition but I always assumed if a liaison was preplanned and someone was paid to or traveled themselves to pay for meeting they were in the same category. That's why I dont travel...
		Originally Posted by Kinder Caress
			
		
	
From 
https://www.unodc.org/unodc/en/human...afficking.html
Trafficking has three  constituent elements; 
 
The Act (What is done)
 Recruitment, transportation, transfer, harbouring or receipt of persons
  
The Means (How it is done)
 Threat  or use of force, coercion, abduction, fraud, deception, abuse of power  or vulnerability, or giving payments or benefits to a person in control  of the victim
  
The Purpose (Why it is done)
 For  the purpose of exploitation, which includes exploiting the prostitution  of others, sexual exploitation, forced labour, slavery or similar  practices and the removal of organs.
So in this context, traveling for a prearranged meeting is not necessarily trafficking if there is no coercion of any sort.  So you are free to travel if you wish.  If you are managed, and payment is given to management, it might be considered trafficking (Transportation, giving payments or benefits to a person in control of the victim, exploiting the prostitution of others).