him thinking you're a creep. wondering to himself if you're the type of person he wants to move forward with. pique his curiosity regarding what other things you have distorted views on.

if he did the same with younger brother of the same age as his sister, would you even bat an eye?

bring it up to him, but don't be surprised when it changes the light in which he views you, and also makes him wonder what other screwed up thoughts are in that head of yours.

no.