Do you sleep in your contacts?

   "Do you sleep in your contacts?"
that's what the advertisement asks.  
   I have slept in the bed.
   I have slept in pajamas.
   I have slept wrapped in the arms of my spouse. 
   But I have never slept in my contacts.
   I may have slept while wearing my contacts. 
   English is a perfectly good language if it's used correctly.  Is it really that difficult to say, "Have you ever slept while wearing your contacts?"
   If reminds me of the Marx Brothers routine where Groucho says, "I once shot an elephant in my pajamas."