I love endorphins - apparently people get addicted to them - that's why some people eat so much spicy food, enjoy S&M, or like it when they lose fights (although that's also adrenalin). Once i accidentally went through a closed window and even though i had a huge piece of glass sticking out of my arm, i didn't feel a thing - endorphins - but with a tattoo it takes a while for them to kick in - it's not sudden like when you get a big injury, so the first part of the tattoo is going to hurt until they start working in your blood stream.