he wants to tell you how to do it?
I'd listen to what he has to say, and if I didn't want to do it that way, just do it the way I was going to
"I'm doing it, I'm doing it my way"
"If you were doing it, you could do it your way"
But hey, maybe I'm just a jerk
We have a rule in our house
"You can tell me to do something, or you can tell me how to do something...but not both"
Truthfully, we both listen to each other's suggestions, but we don't insist
on it being done "my way" if we are not doing it ourselves
Every once in a while one of us has to mention the rule though...lol