Because he didn't study.
Curses, foiled again!
Have you ever seen a money-box (piggy bank) with a hole at the bottom...
Billy's Mom asked him, "Well, why aren't you studying, Billy? You have an exam tomorrow!" Billy said, "Because I've already Reddit thrice."
Because you have to study abroad to understand them.
My bike
BBQ Sauce
You look at your X and try to find out Y
None, that's what students are for.