That’s a good question, I actually don’t when it comes to specifically the psychology of it.
History-wise there are a couple (if you mean modern body art. The best would be Jim Ward’s book Running the Gauntlet. You can also check out Elayne Angel’s book The Piercing Bible.
You can also follow @sacreddebris on here. Shawn posts a lot of stuff pertaining to the early days of modern body art.
If you can find them, the old PFIQ and Body Play magazines would give a good glimpse into the history. They are collectors items, so they aren’t cheap.
Anyone else can feel free to reblog and add any other stuff.
Marks of Civilization (Arnold Rubin). (currently on ebay for $16)
Running the Gauntlet. (Jim Ward)
PFIQ, (Gauntlet Enterprises)
Modern Primitives. (RE/Search)
Body Play and Modern Primitives Quarterly. (Fakir Musafar)
Body Art Magazine.
Piercing World Magazine. (Pauline Clarke)
Spheres of Adornment (Pauline Clarke)
The Eye of the Needle. (Pauline Clarke)
Beyond the Eye of the Needle. (Pauline Clarke)
In the Flesh Magazine.
ModCon. (Shannon Larratt & Philip Barbosa)
Sacreddebris.com (Shawn Porter)