‎The most 9 interesting confusions!

Here you the most 9 interesting confusion that makes you think a lot to find the answer, try to discover an answer to one of it ! 
1. Can you cry under water?
2. Do fishes ever get thirsty?
3. Why don't birds fall of trees
when they sleep ?
4. Why is it called building when
it is already built?
5. When they say dogs food is
new and improved, who tastes
it?
6. "I Love You" is not a question
then why does it need an
answer?
7. Why does round pizza come in
a square box?
8. Why doesn't glue stick to its
bottle?
9. If money doesn't grow on
trees then why do banks have
branches?