Because they have a claus in their contract.
Santa stops at three Hos.
Getting sleighed.
When the leash goes slack.
The leash goes slack
In case of reindeer. And because I caribou.
Stable-tennis!
Not enough cement EDIT: Okay thanks for pointing out that I messed up the wording but the joke is supposed to be the funny part
Only one if you run him through slowly!
Because of his retractable clause.
Hearing AIDS
Because it has long-distance runners on each side.