My company pays for on-site blood tests annually, and it's amazing how much cow-workers complain every year about how bad the tech is at finding a vein. Every year it's a different tech, every year they come out of the room saying the person had to try both arms in multiple spots, before they finally hit a vein. Then they all have bruises inside their elbows for a week. Meanwhile, it's always one try on my arm, they hit oil, and I end up with a tiny hole that's gone by the next day. I just don't understand how you can have a half inch of solid fat over your veins, making them totally obscured, and expect some guy to just get lucky on his first try.