I’m a programmer.
In my family, there is a very defined line between capabilities.
On one side of the line, you have the logic-oriented programmers, and on the other side of the line you have the artists.
And, as my Dad and fellow-programmer often says, “I don’t do graphics”.
You would have to hear the emphasis and take in his posture during such a statement to truly understand the humor behind it — but he’s not joking.
I, too, have difficulties on the graphical-front, but have found it necessary, from time to time, to dip my toes into the image-related kiddie pool.