Where does “耳付く” come from?

耳付く (Japanese) comes from Japanese 付く — attach itself to, stick, stick to, adhere, adhere...

Ancestry of “耳付く”, step by step

Step	Language	Word	Meaning
1	Japanese	付く	attach itself to, stick, stick to, adhere, adhere...

耳付く — Etymology, Origin & Word History | Etymology Explorer