I've only shaved mine once in about 25 years. I started trimming and found that the Adolph Hitler look didn't look good on me so I shaved it off. I've never done it again.
What gets me is that new fashion--the Upside-Down-Hitler look, where the tiny moustache is right under the lower lip. It's so distracting, like a shadow or leftover food.
LOL...mine's been on for 25 years, my wife's never seen me without it and now I'm scared that if I shaved it off I'd look as silly as Cal Thomas does.
Ah, the dreaded trimming-mistake-shave-off. That happens to my quite frequently, especially when trying to even up the sideburns. The Hitler-stache also once happened--I was trying to trim my stache which made me look a little too much like Stalin. I go from one ruthless dictator to another. I had to abort.