Puzzle(jokes)!

(1)Chance to win!
A: In a competitive feat the earlier you lag behind the better is your chance to
win.
B:Why?
A: Because you’ll have more time to catch up with others!
(2)Sanity!
A: You’re intelligent enough to realize that you’re a fool!
B:Are you not quite sane to feel that you’re insane?
(3)Homesick!
A: You always say you’re homesick but you seldom go home!
B :In fact, I’m sick of home!
(4)Looking down!
A: He looks down upon me!
B:Why? Have you done him wrong?
A:No.He’s much taller than me!
(5)Higher studies!
A: Travels help me in higher studies!
B:How?
A: Whenever I travel I keep reading books.
B:How is it related with higher studies?
A: Whenever I travel, I travel by air!