Jobs that remove fingerprints
When I was younger and before I started working with computers I did furniture refinishing. That was over twenty years ago and I still have few finger prints because of it. Currently the only way I can get whats left of my fingerprints to show up is to wash my hands throughly with a harsh detergent removing the oils in the skin so that they show up. A little hand lotion makes them all disappear.
From what I remember reading an article about fingerprints years ago there are about a dozen different jobs, all involving hand labor, that can cause fingerprints to disappear. Brick layers are another group that won't have fingerprints. If you continuously work with an abrasive material over years the body quits manufacturing the fingerprints.
Then there are also those people for genetic reasons don't have any at all. I remember a newspaper article I read years ago about a family that didn't have fingerprints and it was likely that since the parents didn't have them and passed the gene onto the kids that their kids would likely not have fingerprints either.