It's not all good though
Unfortunately whilst a smooth pubis is good for keeping down lice infestations, some researchers have suggested that it may have the opposite effect for other types of STD. The problem is thought to be related to the small cuts and abrasions that one inevitably makes during the process of shaving, which facilitate the spread of infection by contact.
I would post a link to this research, but I'm at work and there's no way I'm putting that in the search box.