I lived in Germany and regularly visited the spa/sauna complexes. I really preferred the smaller hotel or private community sauna houses. Although the larger ones had workout facilities which I would use on occasion. The one I attended regularly near where I lived had times of day for women only, men only and family periods. Funny thing was they usually didn't adhere to the time periods strictly. A couple times I got the times messed up and arrived during the women's session. The attendant just asked the few women in there if they minded a man coming in. Both times I was admitted immediately and the women accepted me talking with me as if it was no big deal.
There a few interesting things that did happen. A few times I signed up for a massage at this one place. When my time came the masseuse had been with the rest of us in the sauna and tub. We went into the massage room and she gave me my massage while she was wrapped only in towel around her waist. Of course I got a boner and she took care of it.
as if it was normal.
The most memorable incident was in a hotel. I checked in after spending a week providing some liaison work with the army during a field exercise. I hadn't been away from the exercise area the entire time, just staying an a small gastatte with small shower and not so hot water. I couldn't wait to get to a nice hotel, cleanup, sleep in a nice bed and eat a nice meal. The hotel had a spa with massage services, a sauna, hot and cold tubs and showers. I showered, got a massage and went to the sauna.
I met this nice couple there and we chatted about things in general. They were not very modest and he would occasionally rub her shoulders making sure to feel her tits as he did. She would lay there opening her legs toward me and caress her upper legs.
Well, after being "out of civilization" for a week this was starting to get me excited. I kept trying to suppress junior, but he kept trying to rise to the occasion. They both smiled at me and I finally said that I was sorry but having not been around a nude woman and seeing them enjoying themselves was causing me to get erect. They just laughed.
I had been in the sauna long enough and excused myself and went to a shower. One minute later both of them joined me in the shower. Without saying a word she started soaping my back and he was soaping her down. I turned around and proceeded to soap her front and she started soaping my front working down to junior. Here I was in a somewhat public shower with a couple - hands pleasuring each other. Both he and I were now fully erect. She went to work giving both of us a nice HJ. Of course I came rather quickly. She said she hoped I felt better, I thanked her and we all dried off and went our separate ways.
I ran into them later in a restaurant and they asked me if I'd join them which I did.