Your cock still half exposed, you reach for the lamp. You rub it vigorously, and the genie pops out with a visible erection.
"Whoa champ, don't rub so hard. You're gettin me all worked up!" The genie laughed, fondling himself.
"I know what I want for my second wish" you say impatiently. "I want to be able to change back and forth between human and this at will. I even want to be able to go all the way to dog and back again. I also want to have the same power over anyone in the same room as me. Can you do that?"
"But of course" the genie said with a smile. "It's done."
Just to try it out, you will yourself to full dog form. It happens much like before, except accelerated. You fall to the floor on your hands and... well, paws. By the time fur has covered your body your cock is completely erect. You look at the genie, and would have smiled if you could. The genie looks surprised as his hips change and his pants fall to the floor, leaving him completely exposed. With minutes he is, like you, a full grown male doberman.
You...