You might get a hole in one.
Because otherwise they would be unable to track movement and move the cursor in the computer screen.
Batman's Parents.
To prevent them from whistling.
A very worn-out thuper hero. (An excerpt from Brother Time and the Turtle: More Excuses for Jokes: )
Like a glove.
Thunderwear!
A pair of slippers.
Child labor laws forced all the shoe factories to shut down.
In case you get a hole-in-one (stolen from some girl at school)
Because all the other fore letter words were taken (Thanks to... this now makes sense...)