How do beginning tattoo artists practice their work?

Obviously they can't practice it on people--how do they perfect their skills before actually moving on to real clients?
Answers

Laura

They do practice on people. They also practice on fake skin, yes you can actually buy tattoo practice skin. Many also practice on pig skin. I know many artists who covered a dead pig in ink before they were ever allowed to go near a person. Once the pig and fake skin stuff shows that they can tattoo, they go onto working with real people, but the people getting tattooed know that this is an apprentice, not a full fledged artist yet.

Sandra

just do it

Dv8s

They practice on cadavers.