One who makes himself a worm cannot complain afterwards if people step on him.
I'm a sucker for a woman with beautiful eyes.
I'm a sucker for emotionally exploitative cello.
What do you take me for? A fourteen karat sucker?
It's morally wrong to allow a sucker to keep his money.
I'm a sucker for packaging!
I'm a sucker for a screwed-up protagonist. We all have issues.
I'm a sucker for Wrigley, so I feel I'll probably be a sucker for Fenway, too.