Small animals are aware of humans and behave differently (or disappear entirely) when humans are present. This is why nature photographers often leave their camera with a remote (or simply rolling) to capture the natural behavior of those animals. And this is exactly what youtuber delicious fishes did when leaving some sunflower seeds and peanuts along with a rolling GoPro camera (all set up on a cute little stone table).
After being done with the food, the little squirrel seems to be feeling alone in the world and turns to the gopro to fulfill his emotional (and sexual) needs. Looks like the photographer did not appreciate the act: “Caught this perverted little buggar loving up my GoPro. Filthy little beast!
[Squirrel Humps My GoPro | h/t Jim]