What does it mean when a guy says he has "zero tolerance" for snooping?

Anonymous

Does it mean I can never look through his phone / DMs in case I get caught?

This has me worried, I've always gone through my partners phones in relationships to make sure they weren't talking inappropriately to other girls.

Updates
11 mo
So I asked him to clarify and he said "it's simple. I catch you snooping once, I change my phone PIN and it would be years until I trusted you again. I catch you snooping a second time, it's over".

A bit over the top don't you think?
What does it mean when a guy says he has "zero tolerance" for snooping?
9 Opinion