No. 2 Joke point disclosure: Joke: Parallel lines have so much in common...it's a shame they'll never meet.
Parallel is a pun, the first meaning is two lines, paths etc that are the same distance apart along their whole length; The second meaning is two people who are like-minded. Two like-minded people look like having same ideas, but unluckily, they can't come across each other permanently like two lines without cross each other. What's your opinion?
No. 3 Joke: There are three kinds of people in the world. Those who can count, and those who can't.
What's the laugh point?