That's just it, isn't it. Once you tell, the genie is out of the bottle. Be honest? Sure, sure, maybe for some, but it's not the best move for everyone.
I say a lot of stupid things. My wife is great and generally puts up with me, but she has this amazing memory and remembers every single negative thing I've ever said. Sometimes she throws those things in my face.
Just imagine if she had the whole steroid thing to throw in there.