Breakfast in Bed Surprise

Alright, listen up, you big dummy! This joke starts out all sweet and innocent, right? Someone's doing a nice thing, bringing breakfast to bed. You, like a lot of folks, probably think, 'Oh, how nice!' But then BAM! The punchline hits you like a truck. The 'thank you' is contrasted with 'How did you get in my house?' See, the humor comes from the sudden, unexpected twist that the person making breakfast isn't supposed to be there at all! It implies they broke in! It's funny because it subverts your expectations of a normal, polite situation into something totally illegal and creepy. You probably never thought of that, did you? Probably still trying to figure out how to tie your shoes.