What do you do best?

In filling out a questionnaire for an online class I was taking, I ran across:
What do you do best? What makes you the most money?
 

Zi says I give good head.

I tend to agree, but, fortunately 

(or unfortunately, depending on how you look at it) 

he doesn't pay me to do it. So I can't make any money for that.

I'll have to think of something else.