One Site, 2 domains: 1 for marketing - 1 for SEO???

Ok, I have client who is a very legit Medical Dr. who specializes in penis enhancement and procedures. No joke, this is a very straight forward practice. Here is my dilema? I have heard keywords in the domain is a very good thing. But in this case, how proper would it be for him to run ads in local newspapers or have it on his business card www*get-a-bigger-penis.com (I made that up as an example only, but you get the point). So, why couldn't he have two domains, such as the before mentioned for the net, and a domain like www*drjames.com which has a redirect to www*get-a-bigger-penis.com Help me out here please, I really need all the help I can on this one. The site by the way is now at http://*tmh.netdbs.com/jamesmd

Just choose a brandable domain and don't worrry about hyphens. Get your keyphrase in the anchor text links on other sites.

Very few branding is done from the URL itself. Maybe 1% of branding campaigns can pull that off. Focus on the drjames.com site and brand him conventionally.