I would say
''Spiral design'' is decorated on Chinese Minoan and Anasazi pottery. Here are two pictures of those arts below. *Also I take NO CREDIT 0% for making those pics I just found them off google.
Principle of arts and the last answer is the principle of design.
I would say the base of their attraction was curiosity and disobedience. Their love was forbidden, so it only made them want it more.