Karen drove Drake to Melissa's house. "She never locks the side door to her garage, so as long as you're quiet, this should go fine." They kissed passionately, and then she dropped him off.
Drake snuck to the small door on the garage, and found that it was in fact open. Getting in was a tighter squeeze, given his proportions, but he managed. Entering the garage, he climbed up some stairs to a loft area where Melissa stored old junk. The stairs up were creaky, and he worried that they would come crashing down under his immense weight, but they managed to hold up, and their creaking did not wake Melissa. Then Drake waited.
The next morning, Melissa got up, went through her usual morning routine, got into her car, and left. Drake waited half an hour, and then carefully climbed down the stairs. He went over to the door that led to the house, but found that it was locked. "Dammit!" he swore, "I knew it couldn't be that easy!"
But as Drake stopped and thought about the situation, a solution came to him. He lifted one mighty leg, and kicked the door handle in! The handle took the entire locking mechanism with it, and flew into the house. Drake smugly pushed the door open, and entered Melissa's neat kitchen.
He strode through the house, looking high and low for the bottle. After half an hour of searching, he found it, hidden in Melissa's bedroom closet. "Who's stupid now?" he asked with a grin. Then, he rubbed the lamp.
"Greetings Mortal, I am Beldazarr, The Djinn of Mind and Body!" boomed the familiar voice.
"Hello, Beldazarr," laughed Drake. "I wish that you would teleport me to Karen's apartment."
"It is done!" announced Beldazarr, as he clapped his hands. In an instant, Drake was standing in Karen's apartment, still holding the bottle.
"What is your wish, O master?" asked Beldazarr.
Drake thought back to the conversation he'd had with Karen earlier. He couldn't go on as an eight-foot-six behemoth; just the ride to Melissa's in Karen's car had been utter torture. Still, he loved the power his body possessed. He thought back to how easily he had kicked in Melissa's sturdy lock, and his crotch stirred in excitement.
"Beldazarr, I wish I would only be seven feet tall, but that I would keep my current muscle mass and strength."
"It is done!" proclaimed the Djinni. Drake felt his body change, as his perspective shifted lower. He was shrinking, but his body was expanding at the same time, as his already large muscles swelled with new power. Drake groaned in ecstasy, as he felt the tight shirt he was wearing tear at the seams, unable to contain him. Finally, it was done. Drake was shorter, but his body was thicker than ever, bulging with enormous, powerful muscles. He couldn't wait to fuck Karen with it.