It hurts my eyes to read something like this. It makes my hair go frizzy.
However, now, I dislike reading about things I have learnt before. For example, Vygotsky's Social Theories, which I have studied twice and Piaget's Stage Theory, which I have learnt three times.
I very much prefer learning about action potentials, movement of ions and the meninges. Things that are completely alien to me.
And, this for me, is a recipe for trouble.