Subverted: Turns out Bob's secretly using Alice's money to provide for his ill, elderly mother.
Double Subverted: His mother's already rich and is in on the scam as well.
Parodied: Bob's obviously a jerk, who's daily activities includes bulling people smaller and weaker than himself and scamming old ladies out of their money, but people repeatedly tells his victims they shouldn't judge him too hard and insists that he's a good man deep down.
Zig Zagged: Bob is usually a douchebag, but he saves Alice from a rampaging tiger. He tells her he only did it to get laid that night. When she turns him down, he decides to buy her a new TV, no strings attached, to make up for his behavior.
Averted: Bob's good intentions are genuine. Or Bob wasn't a jerk to begin with.
Deconstructed: Thanks to Bob's asshole attitude, everyone avoids him like a plague lest they get tricked by him. And because of this, no one is there to save him when Bob gets into trouble, making him die alone.