Finally, after six girls, Luke's wife had a boy. But he only had a head - nothing else. Luke didn't care, though. He was just happy to have a boy.
On his kid's 21st birthday, Luke took him to a bar. "A shot of your best scotch", he ordered.
The boy drank it and - POOF! - he grew a neck. Amazed, Luke then ordered another and - POP! - a torso sprouted. "Keep 'em coming!," Luke shouted. Eventually, the boy had a whole body. Everyone cheered, his father loudest of all.
Tipsy, the boy stood on his new legs and stumbled to the left... and to the right... and out the front door and into the path of a truck.
The bar fell silent.
You know," the bartender said, "He should've quit while he was a head."