We will never know why Brian grew the moustache.
Brian is a very private person on social platforms and the only tweets he made about the moustache were posting a picture with the moustache followed up by a poll about whether he should keep it, which he did. He has posted nothing about the moustache since removing it and it is highly unlikely Brian will break his online privacy to explain his facial hair.- This interview on the MinnMax show
reveals the origin of the moustache! Brian always wanted to try out a moustache and then, after people online made disparaging comments about it, decided to keep it out of spite.
- This interview on the MinnMax show
Reasons for growing, and then getting rid of, the moustache.
- Brian grew the moustache just for the ending of Waluigi Unraveled.
- Definately the most fun explanation, and as a theatre kid Brian has probably commited to weirder ideas.
- Brian wanted to try out a moustache, liked it for a little bit, but in the end wasn't feeling it.
- The most Occam's Razor rationale, and also most likely.
- Brian wanted to try out a moustache, but it ended up interfering in either work or personal interactions so he decided to get rid of it.
- His girlfriend, as can be seen in her articles and videos, likes mustaches, so he tried it out for her before deciding it didn't really work
