I get nervous before every pin and then after it I'm always like that was easy..
3 things have helped me pin.
1 pinch the area with your nails before pinning.. don't even feel the needle go through he skin. And personally that's the hard part
2 get completely naked if doing glutes.. clothes get in the way everywhere.. sounds stupid but it works
3 breathe.. don't hold your breath because you will get light headed and could faint..
Take your time and you will be fine.. you will be surprised how easy it is when your finished
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