The Top Five Reasons Why You Shouldn't:

Ask your older brother for the time while he is writing something.. 

1 - He will draw on you.

2 - He will chase you out of his room threatening to draw on you.

3 - He will ignore you.

4 - He will tell you to come back later.

5 - He will draw a penis watch on your wrist demonstrating that you should come back at a later time.

Of course, I got option five.

Up the right way, is actually upside down.

Morale of this story - look at the clock yourself.

Hahahahaha.