How should I tell him?

So my dawg bob saget, asked me to hold some water for him, so as a survivor of 9/11, I agreed. What I didn't count on, was when the water contacted with my skin, getting me wet. Because of this, I grew a penis out of my left elbow, upsetting my parents! How should I let bob know about this, when he is pregnant with our 69th child. I don't wanna upset him, as he turns into a giant fire monster, capable of destroying an entire smurf village. How can I tell him easily?