I hope you don't do anything drastic with the moustache, but there is nothing wrong with taking a bit off the tips when you feel for it. I usually trim the tips of my moustache every few months. It is amazing how little you actually need to trim to make a big difference. So, if you do opt to do a trim, start by trimming VERY little and be careful not to fall into the trap of over-analysing the results... many a fine moustache has been lost in an attempt to achieve perfect symmetry...

Stop trimming your moustache; greater glory awaits!
...but if you are going to trim, do it right, go pencil...
...then, of course, a nice copstache can be cool too...

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