One of my nephews was born in Germany when his dad was stationed there. He has a U.S. Birth Certificate issued from the military hospital where he was born. But I think you are right. If he wished he probably could get dual citizenship.
I'm trying to remember back when Moira was born. I think a person has to have a residence in Germany for 8 years before a child born to them is considered a citizen. Since I know Scott's daughter was born in the US. and she's 18, I don't think any of the boys would qualify.
As for the pool. I just took for granted that JJ skinny dipped, since Jack didn't mention anything about him bringing a swim suit or borrowing one. Jack said something about him hesitating slightly to gage the culture of the land, before stripping. I took that as meaning that the boys all swam n a k e d and he joined right in.
A good deduction, but incorrect in this case. I just didn't bother to mention his suit.
Back about 12 years ago, I had some problem when a boy told me his mom would have no problem with him skinny dipping, but he was incorrect. It not only cost the twins a friend, but this crazy woman actually contacted the police. While it was only a kerfluffle, it's a problem I prefer to avoid, so I only allow kids to skinny dip when I have direct permission from the parents to do so. We will have some next week, but it will be limited, and we never do it on an 'open invitation' day.
3.6 miles! That boy is committed.
If JJ's brothers are as comfortable with the Japanese baths as he is, then you might have 3 more skinny dippers around the house. You can never have enough skinny dippers. They can brighten up anyone's day just by being there. 
Yes, he is. He rides his bike every day, and he's glad we have some hills and stuff, so he can vary his route. Apparently he would like to ride competitively.
As for skinny dipping - I think you're right. While I never saw Scott naked, JJ says he went with his dad, so I'd guess it's not a big problem with them.
Will JJ and his brother go to school with your kids?
JJ is in high school, so he'll be going with Parker and Devon and in the same grade as Leif.