PAPER BAG

A Paper Bag goes into the doctors and says
" Doctor I think I have AIDS"
The Doctor says
" That's impossible but if you insist I will take some samples for analysis"
He proceeds to take a sample of the bag and says
" The sample will be sent of today and I will have the results next week so give me a ring then"
The following week the Paper Bag nervously phones the Doctor and asks for the results. The Doctor says to the Paper Bag
" I have good news and bad news for you".
There is a short pause and the Doctor says
"The good news is you don't have AIDS but the bad news is your Mother was a CARRIER"