With Zeus, it's not uncommon for "Pinky" to come out after he's done mounting something or he's been sucking on it (yes, on occassion, he will suck the thing). If "Pinky" is continually sticking out and doesn't go back in, I would at least consult with your vet. I know there are cases where it doesn't retract back in correctly and a vet has to help it along. Not trying to worry you, but just be aware of it.