Yet another day at work:

My job is to write test libraries for web services and test others code. Yes I know to code, and have a niche in software testing.
Sometimes developers (whose code I find bugs in) get so defensive and scream in emails and meetings if I point out an issue in their code.
Today, when I pointed a bug in his repo, a developer questioned me in an email asking if I even understood his code, and as a tester I shouldn’t look at his code and only blackbox test it.

I wish I can educate the defensive developer that sometimes, it’s okay to make mistakes and be corrected. That’s how we deliver services that doesn’t suck in production.