Because it makes cents (sense).
Because its head is on one side and its tail is on the other.
J.C. Penny
Let's get together and make some cents.
Because it didn't make any cents!
You take the "S" out of safe and the "F" out of way. One of my all time faves. If you say it out loud it will make sense
Because all the other fore letter words were taken (Thanks to... this now makes sense...)
Because he was in-a-cent!
Abraham Lincoln. He was in a cent.