Because it said concentrate.
Because he couldn't concentrate.
Because they are made to concentrate.
She couldn't find the 11 on the dial pad.
Because she threw out all the bent ones.
In case she wanted black coffee.
I told her 'No, thanks. The carton works fine.'
Lack of concentration.
It said "concentrate" on it!
There are two answere: Time and Boo (from Mario games). Just made this joke up what do you guys think
Square eyes