A) Weirdly every human feels the needle pain kinda differently because our nerves are never placed completely the same but
B) in general do NOT start with your back - I have lots of ink on my back. All along the spine and upper back. Upper back was the only tattoo I passed out from. lol
C) Anything where u have tons of nerves (armpits, around your nipples, back, neck...) = massive pain.
D) Anything where u have thin skin and bones underneath (shinbone, ribs...) = massive pain.