On Linux/BSD you should already have wget installed.
For windows, you can get it
here.
Make sure wget is in your path, and type
wget -r http://www.the-sex-website.org/images/ and watch the porn come rolling in. =)
NOTE -
Theres some, shall I say, manly porn in here, so use at your own risk. Theres a good deal of unmanly porn too, so eh?
