Her masturbating and fondling your dick was not being comfortable. She was aroused. If you want to understand European Spas or beaches, we are comfortable being nude. You start doing things, sex, masturbating, yelling and jumping around embarrassed, or whatever. We are just happy to not have to wear clothes.

If she has already been topless on the beach and nude in spa, going to a nude beach is not such a big step. Everybody is nude there, everyone is the same way.

Bigger step is when she will be more exposed than other people. Like clothing optional beach with more clothed people. Or when she stops covering in spas even outside saunas, walking and lying naked on a lounger, when other people are covered in towels...

So, my advice is do not wait too long, do not wait for perfect opportunity, just find a nude beach nearby and go there as soon as you can. I am not sure about the weather this year, but if you must wait for the next year, try to visit spas and saunas in winter as much as you can to set nudity as norm for her.

Btw. in your previous story, you have described a lot of girls. But could you add more details about your girlfriend? Was she naked in saunas? Or only in showers? It would be great if you describe some of the situations.

German Sauna
 

I recently visited our local sauna alone, normally I go there with my wife but she was away for the weekend.
There are 4 normal saunas, a steam room and an indoor pool. Mostly old men and older couples but also some young couples. Overall it was a quiet day with only a few visitors.

I was alone in the Bio-Sauna (only 60 ° Celsius, no Aufguss) and lied down on my back in the upper bench and almost fell asleep. The benches whrer U shaped, I was in the middle part. A young coupled entered the sauna, but they did not sit next to each other. He was sitting on one side and she lied down on the other. Her knees where bent up and slightly apart. When I sat up I had the perfect view straight between her legs and saw her beautiful shaved coinslot pussy. She had her eyes closed, her boyfriends also had his eyes closed. She also had beautiful full D cup tits. I tried my best to not get a full erection but my dick was visibly excited. So when she opened her eyes she definitely noticed but played it cool :D

In the relaxation area I noticed a beautiful south american looking woman in her late 20s lying on her side. She was well rounded but not fat. Her pink bathrobe was very short and slid up, exposing her ass. I lied down on a lounger behind her and had a perfect view of her meaty pussy labia between her buttcheeks. I tried to read my book but had to look at her beautiful pussy over and over again, but I tried to not stare too obvious. After half an hour she left and I was finally able to read my book. :p
A few hours later, the sauna was closing soon, I was sitting in the steamroom alone. An older dude entered. After two minutes he said "awesome lips, right?" At first I was confused. Then he said "that girls pussy, lying on her side. I noticed you took a good look." I was really embarrassed because I thought it wasn't so obvious I was staring. He told me he was behind me and also stared at her pussy the whole time. We discussed her pussy shape and the shape of her big tits. It was really odd to talk with a stranger about this girls body but also quite fun.
He told me that he walked into her and her guy early when they were alone in the steam room. Apparently she gave him a blowjob in the steamroom. :D

For masturbation and sex in public (while others watch) we have "swinger clubs". And the pig beach in Cape d'Age. And sex cinemas.

Will be in Berlin for Friday, Saturday and Sunday, full days.
I am staying at an airport hotel and will have a rented car. Which place is better to attend for full day (opening to closing?).
Is it true that in Kr****ll there are not young people anymore? I spent a lot of time reading reviews and they say that its all about 70y.o.++
A friend visited on a Wednesday, and he said that his wife was the youngest woman there, at her early 40s.
To be honest, this place is the closest to where I am gonna stay, so it will be difficult to go to V****i. What about Sat**a? Anyone been there?
I wish I could find some girls/couples at their mid 20s-early 40s

Glasses are unfortunately useless at the sauna because they steam up as soon as you walk in and stay that way for the duration. If you can’t see without glasses, contact lenses are the way.

Kristall on Wednesday, with lower prices and clothing optional, attracts older locals in the opening/morning time. Your friend probably picked the worst time. But I have been there on wednesdays and always had enough young ladies.

From the airport train connections are fine to both V and K, stations are BER to HBF for V and BER to Kristallbad, look on vbb.de. Trains are clean and safe. Cab is €50 per trip, train €5 per person and trip. Especially with the cool bar inside the pool in the K I wouldn't drive.

I would do K on friday, V on saturday, and choose one for sunday. The clothing optional before 17:30 in K on sunday might be fun when all must strip.

Sat**a is much smaller than V and K, so it is more risky. You should book in advance if you go there, and the risk of not seeing much is worse. I wouldn't choose it.

No they don't. How would they steam up with a humidity of 10%?

Thank you very much for your quick reply... Will probably go for K on Fri, V on Sat and then again K on Sun.
Another issue I have that might not be right, is that when I try K on google maps on Fri, Sat & Sun, it show that the place is not busy at all, so I dont want to waste my time on an empty spa.
I have great experience on Amsterdam places, e.g. I go to Z once a month, because I have monthly business trips, and its always packed on weekends. Many other places are like that around there.
It will be my first time in B city, actually my first time in a German spa.
Your info is so much worthy, is it busy on weekends?

If there is sauna with low humidity, it is of course ok. But going to a sauna world, where are many saunas with different temperature and humidity, but could be in the proper Finnish sauna only (where should be 10 to 20 %, of course if they properly control it, which does not happen always), is quite unpleasant.

Some saunas can be also outdoor, so you are going out and in. Everybody who wears glasses can confirm, that when you go inside from outside in winter, the glasses fog up. Of course, there are some situations when not, but it happens quite often. This is not theoretical exercise. I have already tried for you. Disposable contact lens are best.