I think this may be one of maclane4’s videos. This features a naked woman wearing glasses at a German nudist sauna spa. They also have these in Netherlands and Austria as well. Most have separate shower areas where people bathe (some spas have mixed gender showers) before entering the spa facilities which include a sauna, pool, and possibly a snack bar. After that initial shower, everybody is completely naked. Coed nude spa, sauna, or whatever you want to call it. It’s mixed gender, all nude.
Does that sound sexy to you? 😀
There are very few of these videos floating around as it is next to impossible to smuggle a camera into one of those nude spas.