Honesty is the *best* policy? Really?

We've always taught our kids the importance of being honest. Even if it means there are consequences (the consequences for lying will ALWAYS be harsher than being honest about something you've done wrong) - but can I be honest? Sometimes I wish we didn't stress this quite so much... For example:

When I was working out to a circuit training video, Jack looks at the people on the video and then back at me and says, "Are you doing what they're doing, Mommy?"

While trying to see the computer screen through the sweat dripping in my eyes I reply, "Yup."

"Well, it sure doesn't look the same..."

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And then this morning while I was painting my toenails:

"It's okay, Mommy, you just need a little more practice... then they will look good."

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Now that I think about it, I'm wondering if we should just change our "Honesty Policy" to:

 "Silence. Give it a shot once in a while."