Transformer Pun

Okay, you smooth-brained individual, let me break it down. You see, a 'transformer' is a robot that can change shape, like a car turning into a robot. You were pretending to be one. Your girlfriend was obviously not impressed. When she said she was leaving you, you said you could 'change'. This is funny because it sounds like you mean you can turn into another form (like a Transformer) but you are also saying you can change as a person. You're using the word 'change' in two different way! Do you get it now, dummy?