Do you agree that every man should grow a beard at least once in his life?

If you can grow a beard then the choice is pretty much one of personal preference. However, if you cannot grow a decent beard then there is no point; you just look stupid and immature.

Note that 'decent' does not mean the same thing for everyone. Some people can manage a goatee but nothing else, some people can keep a goodchinstrap or full-face beard but nothing under the chin. If you can't tell, let it grow for a week or two, and then trim anything that you see skin underneath; anything left is what you could try. If nothing is left, then shave every day and sooner or later you will have something to try again with.