Surely you've read Piercing Hole by Harada, right? It's a personal favourite. Also Sweet heart trigger? There must be a "body mod" list somewhere, hold on...
I've read both of those, but thank you. :) If you could find a good list that would be amazing
Not too extensive http://www.mangago.zone/home/mangalist/70454/?filter=&page=4
I thought I was following a huge one but I guess I'm getting manga sites mixed up. Your best shot is to navigate through the tags, you'll never run out of material.
Thank god shTrigger got super popularrrrr
For tattoos and piercings, you can search through the tags
http://www.mangago.zone/tag/tattoos/
http://www.mangago.zone/tag/tattoo/
http://www.mangago.zone/tag/body+piercings/
http://www.mangago.zone/tag/piercings/
or something similar.
It's probably a bit harder to find a good tag for the rest...
http://www.mangago.zone/tag/heterochromia/
Konya mo Nemurenai especially the second series but u must read these to understand. The tato and Endo 10/10(⌒▽⌒)
Please recommend some Yaoi where the seme or uke has lots of tattoos or piercings, or a strange feature that stands out (like a different colored eye, big ears, crooked nose) stuff like that. Thank you :)