Neither of those people are me. Personally, I didn't do anything so exciting. There was a "no dating" rule for the program I went through, and they could enforce that kind of thing since we were high school students (I guess it's to minimize the risk of an international baby? High school kids are fucking stupid, after all). When I first got to school, I very quickly noticed how insanely quickly words traveled and rumors spread through the girls. The students and teachers at my school were very friendly, and one of the teachers was directly associated with the program used to send me there. Essentially, if I were to enter a relationship, it would have to be a secret, and it was plainly obvious that none of the girls there could keep a secret at all. Eventually, I got used to not being in a relationship, and I was too stupid to realize I could change that until about a week before I had to leave. I confessed to a girl I had a crush on, we went on a single date during which we didn't even hug, and then I left a few days later.
I heard from a friend of mine who happened to be in a different district that a guy she knew got laid almost every night for the last four months of his exchange, as his host sister got the hots for him. Lucky bastard.