Since humor is subjective and this forum reaches all over the world, what is an appropriate joke for all audiences for you. Here is mine: A blind guy walks into a store and starts swinging his seeing eye dog around his head. An employee comes over and nervously asks if he can help. The blind guy replies "No thanks. I'm just looking around."
Why was the blonde girl tip-toeing to the medicine cabinet? Because she didn't want to wake up the sleeping pills.