Cameron Diaz is terrified of commitment in every way. When asked about settling down with Justine and perhaps starting a family she nearly freaked out:
Yeah, exactly, the commitment! I don't even want a dog. I don't. My cat just died, and I don't want a cat. I hate committing myself to anything.
I think everybody wants at some point to have that responsibility and involvement. But not at the moment.
So I'm really bad at saying, 'Yeah, I'm gonna be there in three months… (It's) probably the lack of discipline, honestly. I'm a spoiled brat worried about getting my way every time!"
Source: Gossip Rocks