This is not true. Studies have shown that women are most attracted to "heavy stubble" which displays a man can grow a full beard but keeps it short.
Full beards were considered a bit less attractive but scored high in intimidation and aggression.
Clean shaven tested as least attractive, least intimidating, but most "professional" (AKA whipped helpful peewee herman steve urkel f4gg0t in a pink necktie).
Sources:
http://www.huffingtonpost.com/2013/...y-stubble-men-attractive-women_n_3180157.html
http://www.ehbonline.org/article/S1090-5138(13)00022-6/abstract
If you want to impress teenage girls: Thick adult stubble
If you want to terrify teenage boys: Full beard or bushy mustache
If you want to get pounded in the ass by teenage boys and frequently mistaken for a girl: Clean shave
BTW I just googled "Jimmy the Greek", he seems like a real rocket scientist... lol