Why do Jewish men have beards?

Leviticus 19:27 - "You shall not round off the side-growth of your heads nor destroy the edges of your beard."

Many Jews have voluntarily taken upon themselves a stringent interpretation of the above verse, according to which the beard isn't shaved, or is trimmed but not shaved completely. As such, many Jewish men have beards (it's the reason I have one, too). However, as tends to be the case in Judaism, this law is open to Rabbinic discussion and there are other ways in which the verse can be interpreted - some halakha-authorites say that it bans only the use of a razor which cuts the hair against the skin and thus it is acceptable to trim the beard with scissors or to shave it completely with an electric razor that doesn't shave too closely.