a curvilinear relationship

I've decided to give this challenge thing a try, I think its a very good incentive to improve. So I finally had some inspiration to actually do things, which also helped))

The July Challenge for [link]

Curvilinear relationship is a relationship between two or more variables which is depicted graphically by anything other than a straight line.
Personally the shoulder-neck line always reminded me of a curvinear line they typically draw in stats textbooks. (I'm sad). As for Aleister, I think he would have a complete and a fully satisfactory relationship with himself, if he could. Hmm.

Aleister is a Spirit Echium.

Critique is appreciated