And by it, we mean, well, it:

As Kristopher Schau and his band Cumshots were in the middle of their concert; a young couple entered the stage, stripped and had sex.
...
The young couple, Tommy Hol Ellingsen, age 28, and Leona Johansson, age 21, are members of the environmental organization "Fuck for Forest." They have sex in public in order to put focus on the rainforest.

Note: Includes not-safe-for-work photos.

Just when you thought hippies couldn't get any weirder...