Yeah it's an old Insex clip, managed to track down a full copy after seeing the same GIF on a Tumblr feed. Theres two girls getting the treatment, its only brief about 90 seconds, but good none the less
Hey! To expand on what Warder said, it's from an Insex shoot called "The Ripening II" - I'm not sure if I'm allowed to link it here, but you can easily find parts 1 and 2 on google. The part from the GIF happens around 53 minutes into the video.