Sometimes Adrien thinks about the pressure on his shoulders and knows that if that pressure wasn't there, he would have never become Chat Noir. After all Chat Noir was a symbol of what he was inside, free, flirty, a bit silly, exactly who he wanted to show the world but couldn't. Sometimes when his father was sleeping and he needed a bit of freedom, he'd transform and just roam, until he meet Marinette, sweet, teasing Marinette, she was like a breath of fresh air, no matter how loud or how demanding he was, she still put up with his antics.

Once she said he reminded her of a stray cat always jumping from place to place, just happy to be moving. She was right, after all stray cat took care of themselves and were happy with just being free. Of course he was a stray cat, with his father never at home and his hope from freedom but Marinette forgot something, if you gave a stray cat some milk, there's a big chance that the cat will come back.

In this scenario he was the stray cat and she was his milk, so he'll always come back for more.