You walk the block and a half over to Katie's house, and knock on her front door.

    <<knock knock knock>>

    A moment later, Katie appears at the door.

    "Brad?"

    "Hi, Katie.  Wanna see my ass?"

    "Um, no thanks."

    "Oh."

    Katie closes the door.
 


    Knock again.

    Put your naked ass against the door, then knock again.

    Forget this.  Go to Sandy's.