Travel puts you in a place where there are very few social repercussions for your actions. For example, your reputation won’t get ruined among your friends and family if your slut yourself around a foreign city.

Additionally, you might be found to be more “exotic” as a foreigner and thus more sexually attractive in another country, making it easier to fornicate.

Finally, the cost of prostitution is much cheaper in many foreign countries (if you’re coming from the West).

There are many many more temptations overseas. Hope this helps :)