Could be he's keeping an eye on who's in his house or he's curious or he's hungry, who knows what they're thinking really. Our male is very active at night and will stick his head out when we go in his house for anything....Sophie on the other hand rarely comes out, only to feed these days, but she is very docile when I handle her and neither have ever been aggressive. They do all seem to have a different 'personality' so to speak.