I usually shave every other day, or any time I have to do something publicly, such as public speaking or teaching.
On the other hand, I have had the handlebar moustache since 1973. It is getting more difficult to maintain, since it
has gone gray and unless I treat it, it would look like a steel wool pad that a couple Rottweilers fought over.
sometimes I would as soon shave it off...but by now, it is grandpa's trade mark, and anyone who I have met over the last 50 years wouldn't know me.