A thermodynamics professor had written a take home exam for
   his graduate students. It had one question: Is Hell exothermic (gives
   off heat) or endothermic (absorbs heat)? Support your answer with a
   proof."
   Most of the students wrote proofs of their beliefs using Boyle's Law
   (gas cools off when it expands and heats up when it is compressed) or
   some variant.
   One student, however, wrote the following:
   First, we need to know how the mass of Hell is changing in time. So,
   we need to know the rate that souls are moving into Hell and the rate
   they are leaving. I think that we can safely assume that once a soul
   gets to Hell, it will not leave. Therefore, no souls are leaving. As
   for how many souls are entering Hell, let's look at the different
   religions that exist in the world today.
   Some of these religions state that if you are not a member of their
   religion, you will go to Hell. Since there are more than one of these
   religions and since people do not belong to more than one religion, we
   can project that all people and all souls go to Hell. With birth and
   death rates as they are, we can expect the number of souls in Hell to
   increase exponentially.
   Now, we look at the rate of change of the volume in Hell because
   Boyle's Law states that in order for the temperature and pressure in
   Hell to stay the same, the volume of Hell has to expand as souls are
   added. This gives two possibilities:
   #1. If Hell is expanding at a slower rate than the rate at which souls
   enter Hell, then the temperature and pressure in Hell will increase
   until all Hell breaks loose.
   #2. Of course, if Hell is expanding at a rate faster than the increase
   of souls in Hell, then the temperature and pressure will drop until
   Hell freezes over.
   So which is it?
   If we accept the postulate given to me by Ms. Therese Banyan during my
   Freshman year, "That it will be a cold night in Hell before I sleep
   with you," and take into account the fact that I still have not
   succeeded in having sexual relations with her, then #2 cannot be true,
   and so Hell is exothermic.
   The student got the only A.

Q. Why does Mary Lou Retton smile so much?

A. Because she found out what the big boys eat. 

What is the difference between a dog and a fox? 

Eight beers. 

   One night, at the lodge of a hunting club, two new members were being
   introduced to other
   members and shown around. The man leading them around said, "See that
   old man asleep
   in the chair by the fire- place? He is our oldest member and can tell
   you some hunting
   stories you'll never forget."
   They awakened the old man and asked him to tell them a hunting story.
   "Well," he began,
   "I remember back in '44', we went on a lion hunting expedition in
   Africa. We were on foot
   and hunted for three days without seeing a thing. On the fourth day, I
   was so tired I had to
   rest. I found a fallen tree, so I laid my gun down, propped my head on
   the tree, and fell
   asleep. I don't know how long I was asleep when I was awakened by a
   noise in the
   bushes. I was reaching for my gun when the biggest lion I ever seen
   jumped out of the
   bushes at me like this, 'ROOOAAAAARRRRRRRRRRRRRR!!!!!!!!!!!......' I
   tell you, I
   just shit my pants."
   The young men looked astonished and one of them said, "I don't blame
   you, I would have
   shit my pants too if a lion jumped out at me." The old man shook his
   head and said, "No,
   no, not then, just now when I said
   'ROOOAAAAARRRRRRRRRRRRRR!!!!!!!!!!!'"
   

A young punk gets on the cross-town bus. He's got spiked, multicoloured
hair that's green, purple and orange.  His clothes are a tattered mix of
leather rags.  His legs are bare and he's wearing worn-out shoes.
 His entire face and body are riddled with pierced jewellery and his earring
are big, bright feathers. He sits down in the only vacant seat, directly
across from an old man who glares at him for the next ten miles.
 Finally, the punk gets self-conscious and barks at the old man: "What are
you looking at you old fart...didn't you ever do anything wild when you were
young?"
 Without missing a beat, the old man replies: "Yeah, back when I was young
and in the Navy I got really drunk one night in Singapore and had sex with
a parrot.... I thought maybe you were my son."