I found the flickr account of the Swedish student-photographer who took the pics in the first post of this thread. Her name is Jenny and she's quite cute herself. Here are those pics again in bigger file sizes plus a few more from the presentation called the Bastuföreningen - which translates to sauna association. The blond in the black skirt is obviously the girl in the middle above giving us such a nice view of her butt.
Here are the pics again from her account in a bigger file size.
interestingly, if you slow down
the video of the towel drop ,at 1:11 you can see the flash go off right by the videographer - that is probably the flash from our photographer since the angles are so similar.