meaning

I am not a native English speaker. Inread Toronto Notes and there is this sentence in clinical presentation of Seborrheic Keratosis : "well demarcated waxy papule/plaque with classic 'stuck on' appearance". What I know from 'stuck on' is that it means attached, but I don't think the meaning...

The truth is, all I'm interested in is how the mind works : psychiatry and neurology. I plan to be a psychiatrist, this is what I've always wanted as a doctor, I never thought about becoming specialized in any other area. My question is how can I get over my huge disinterest in studying all...