But I have remembered another good one!
When I was a freshman in college I moved in the dorms two doors down from one of my best friends from High School. I was sitting in his room, chatting with him and some other people on the floor when his phone rings. We've all been joking around, and (since this is before the age of widespread caller ID) someone quips, "It's probably his mother!" as I pick up the phone to answer, "Dave's house of porn and pain, how may I direct your call?"
His mother, after a stunned silence, answers "...is David there?"
I blushed and handed him the phone, muttering profuse apologies.
A year passes, and we find ourselves in a similar situation, and my phone rings. Dave's lips quirk into a tiny smile as he scoops up the phone (still no caller ID). "Kennon's house of porn and pain, how may I direct your call?" he says.
My mother, stunned for a second, asks, "...is Kennon there?"