A blonde gets a job painting lines on the highway. At the end of the first day, her supervisor is impressed. "Wow!" he says. "You did eight miles today! That's amazing!"
The second day, the blonde's production is down to four miles. "Still pretty darn good," the supervisor says.
On the third day, the blonde only does two miles. The supervisor calls her into the office. "What's going on?" he asks. "The first day you did great with eight miles, then yesterday you were down to four, and today you only managed two. What's the problem?"
The blonde rolls her eyes and says "Duh! The paint bucket keeps getting farther away!"