A new wave of image spam with subject lines like "Find a Girl in Your Town" touting a website that claims to help recipients find prostitutes in their area is making the rounds now. The messages contain a URL that must be typed into a browser. The URL links to an explicit web site with a search tool for prostitutes by region and city.
It is not clear if the site works, if it hosts malware, or both. As usual, if you receive this email, you should NOT type in the link and visit the site. All moral arguments aside (of which there are obviously many), you should assume that the site hosts malware and that visiting it will compromise the integrity of your computer/network.