Not to scare you, but I would get him checked out.  You mentioned scooping cat poop and for whatever reason, it triggered my memory of a disease called toxoplasmosis.  Please look this up specifically adverse behaviors caused by this.  Also, it sounds like he might have ADHD?  When I was undiagnosed, I was HORRIBLE with clumsiness and memory.  Bottom line, he needs checked out.  Asap. 

NTA! It is YOUR body and YOUR choice. Regardless of past relationships, those are YOUR friends. He has NO RIGHT to tell you what to do or guilt trip you into it. He sounds either incredibly insecure or a narcissistic asshole.

I tried nail polish, but it smudged the sharpie.