unemployed is worse... hey, at least if you say your a sperm donor, you can ask if they'd care for a free sample!!!
all jokes aside, for the moment... seriously, the tests to become a sperm donor are pretty stringent... both mental ( IQ ) and physical, along with stict drug testing policies, not to mention STD's.... IF that is really what you do, then I'd start by saying that you work for a "fertility clinic" which isn't lying, not in the least... many women would find it an attractive thing, after they get to know you a little, since you're helping families have children that cant on their own. Its "noble" in its own way... and they will at least know that you are disease free, and drug free...
then as you get to know the chic, then maybe tell her you spooge into cups for money.... heheh...just kidding. seriously, though, how'd you land that job, I'm curious and serious, I've been interested in getting into that type of thing.. I've gone to college, and am in perfect health...I hear its pretty good money, and Its a job any man could enjoy... hell I do ( well sometimes my girl helps!) all the "work" now for free anyway, it seems like such a waste for me to destroy all the product though...