Ahh yeah. I was going to mention the poor person who has to collect sperm as the worlds worst job, but a picture is always worth 1,000 words!
A very close second to the worst job is the person who has to pick up animal carcases off the road. (EWW!)
"All I ask of you is one thing: please don't be cynical. I hate cynicism -- it's my least favorite quality and it doesn't lead anywhere. Nobody in life gets exactly what they thought they were going to get. But if you work really hard and you're kind, amazing things will happen."
Conan O'Brien