# Why starts the rotation vector of a body in the intermediate axis theorem to rotate in the same direction as the body?

In this video, explaining the intermediate axis theorem (Dzhanibekov-effect) in a very nice way (around 7:52, from the perspective of the co-rotating frame where centrifugal are present) one can see (starting at 1:12) that the axis of rotation of the wingnut itself starts to rotate (on subsequent momentary cones with the top in the center of motion).

I asked myself if this is always the case, for every object rotating around a principal axis with a moment of inertia that lies between the highest and lowest momenta of inertia (the intermediate axis). The axis of rotation will always start to rotate on a (continuously in width varying cone) cone because the axis of rotation can't be exactly aligned with the direction of motion (though this motion is not necessary for the effect to occur). No matter how small the angle between the two, the angle will grow in time.

Now, why should the rotation of the body's rotation vector on the continuously changing double cone (from small width to a plane to one with a small width again) have the same direction as the rotation of the body around its intermediate principal axis?

Is the intuitive explanation I give in the answer plausible?