Elderly Conversation

Three elderly men are talking about their aches, pains and bodily 
functions. The 70 year old man says, "I have this problem.  I wake up 
every morning at 7 and it takes me twenty minutes to pee."  The 80 year 
old man says, "My case is worse.  I get up at 8 and I sit there and grunt 
and groan for half an hour before I finally have a BM."  The 90 year old 
man says, "At 7 I pee like a horse, at 8 I flop like a cow."  "So what's 
your problem?"  ask the others.

"I don't wake up until 9!"