Get the back of someone’s stud ear ring, put it against your skin using a small amount of pressure & then scratch it along your skin.
My wife did that to me when I asked her how it felt, she did that & it was pretty accurate – I’ve got a phobia of needles but its nowt like having injections
At times it’ll hurt more than at other times. I’ve been told that it hurts more over skin where there is bone close to the surface than it does over fleshy bits like your calf. Also, the outline of your tattoo hurts more than the “colouring in”
I was also told by my tattooist that, in general, men find it a far more painful experience than women