Yes. Shave that thing. When you're 16, your stache is probably pretty thin, and doesn't look too good. Shave it, and wait until you're a bit older to grow out a mustache (if that's what you want to do).
Does trimming increase beard growth for teenager?
Resist trimming to grow a beard Many individuals feel that trimming would accelerate their beard growth. However, there's no scientific backing behind it. So if you're looking to grow your beard long, don't trim it at any cost.10 Aug 2021
Should I trim my beard at 15?
Puberty starts at different ages The ages vary and can be anywhere from 8 to 15. Although there is no right age to begin shaving the decision often depends on a number of factors including how much hair he has and if it's bothersome or embarrassing to him.2 Jun 2011