Happy or Sad?

Three women dressed in suimsuits were standing together. Two were sad and one was happy. But the sad women were both smiling and the happy one was crying>
Why should that be so?

Chess

Two grandmasters played five games of chess. Each won the same number of games and lost the same number of games. There were no draws in any of the games.
How could this be so?

The Man in the House

A man entered a house. There was no one else in the house. H walked into a room, stopped, and then slowly raised his hands above his head. After a moment, he turned around, let out a laugh, and left.
Why?