I don't believe in waiting until marriage, but I do believe that sex is best when it's between two people in a special and loving relationship. I could even excuse, if it were my place to do so, a (singular) one night stand.
But a new bedmate for each new country visited? Man or woman doing it, that's just wrong.
It is not 'just wrong'.
Like anything, there is a right way and a wrong way. The right way is using a barrier and chemical birth control, and picking your guys with care, preferably while sober, with both parties understanding and agreeing that is is just for fun.
There is nothing wrong with casual sex done well.
I personally am not one for casual sex. I get emotionally entangled with people too easy for it to be practical for me, but I have friends that don't ever have or want serious relationships, and they just have loads of casual sex. They just try to do it properly.
I was a habitual "relationshiper." I would meet a guy, go out with him, and it resulted in a relationship that ended with a marriage proposal or even a marriage twice. I overlooked my needs a time or two to make it "work." Because that's what I thought I was supposed to do, work at it. That's not good, either. At least, not for me. So I decided to stop "working" on it and if the relationship did not meet my needs, to just move on. That's where the dating around came in.
Might I say I have never had a one-night stand. All my activities were done with someone I knew and dated for a bit. But I did not waste my time with someone that wasn't a good fit, something I had to learn to do.
Nine guys in nine countries does sound like quite a lot, but there's nothing to say that one or two or three weren't with someone she knew or at least took the time to know.