Why can't you cuss on here
The Guidelines prohibit it -- http://www.ask.com/about/community/guidelines Profanity just is not needed to ask and answer questions when there are so many other great words available that are within the guidelines. :)
Why would you need to? They are just extra words that are meaningless to what you might be asking, and it takes longer to type something.
Why would you want to!!
You're bored because you're not allowed to "cuss" on line? What an interesting mind you must have.There are times when bad language is appropriate but usually it's far more effective to use the correct words to do the job. Try expanding your vocabulary. It's worth doing.