In the film Blood Diamond, journalist Maddy Bowen and smuggler Danny Archer have a conversation:
M: Hi. I'm Maddy Bowen.
D: How about you dance with me?
M: No, I don't dance.
D: Neither do I. Come on.
M: So, Danny...
M: Archer. When did you first start moving stones? Was it Angola? Then you did the whole mercenary thing. Was that fun? So, what are you? Nihilist? Opportunist?
D: Maybe I wasn't breast-fed as a child, huh?
M: You think I haven't met people like you before?
D: I think you get off on people like me.
M: You think?
D: When did you first start working for Van De Kaap?
M: Christ, you never stop, do you?
The Free Dictionary defines the verb breastfeed as
To feed (a baby) mother's milk from the breast; suckle.
But I don't see the relevancy it has with the rest of the dialogue. What does "Maybe I wasn't breast-fed as a child" mean in this context?