Seeing the recent success trend of contests in Mouthshut, I've decided to start a new section called "Mind Ticklers". This section will contain riddles, puzzles, brain teasers etc to tickle the brains of the MS members. I want to try to make this into a contest eventually, but I don't know how I can judge fairly, since everyone logs in at different times, the times for solving the puzzles will vary accordingly. So I welcome suggetions from other members on how to make this section a fair contest.
For the starter I'll just post a few riddles to warm you up, PLEASE REMEMBER TO SEND THE SOLUTIONS WHEN YOU'RE DONE AS AN M2M TO ME. Posting  the answers in the comments section will just ruin the fun of the puzzle. I'll post the names of the members with the correct answers later. Anyone who can  give the correct answer will be featured, since I don't know how to solve the time limitation problem yet. Happy Solving!

1) A man wants to cross a border between two countries illegaly. A guard is sittinf midway in No mans land. If the distance between the borders is x feet, he is sitting at x/2 feet. The huard sleeps for 2 and 1/2 minutes and wakes up, looks around and goes back to sleep for the same period again. If the man runs at his top speed just as the guard falls asleep, he will reach the guard just as he wakes up and will be thrownback to where he came from. How will he cross? He can't cross from any other point on the border.

2) One man shows another man a photo of a man and says "I have neither brothers nor sisters, but this man's father is the son of my father". Who is the man in the picture?

3) In a small town, there are only two saloons. One is large, beautifully decorated and clean, and the barber has a wonderful haircut. The other is small, dirty and not decorated at all, and the barber has an awful haircut. A tourist visits who is very picky about getting a good haircut. He chose the small and dirty saloon for a haircut. Why?