The 49-year-old actress, who adopted Louis in 2010, insists her son is very protective of her, reported E!Online.
"He's in a situation where he's not liking that someone's there with a camera. He's usually giving stink eye, but he's giving stink eye because he doesn't want anybody messing with his mom. That's what breaks my heart, because he's doing it... He's like, 'Don't get near my mom,'" Bullock said.
"He doesn't know why those people are there but he senses-any time any man gets near me, he's like, 'Dude, don't get near my mom.' So when there's about eight of them, it's the same thing. It's like he doesn't like that energy that's coming," she added.
"But he does that for his friends at school. If someone's getting picked on, he gets in between the person getting picked on and says, 'Don't do that, the police are gonna get you!'," she said.
"And then he says, 'You have to use your words.' But he's all dude. He's just a dude. And I'm learning a lot about being a dude! Apparently when you sleep, your hand needs to be down your pants," she added.