If it's feature length xxx iPod Touch movies you're after, and you plan on watching them often, then downloading them to your computer and transferring them to your iPod Touch using iTunes is the best way to do it.
This method is a little more time consuming to set up as you download each porn movie to your hard drive and take a minute to import it in to iTunes. the final step is to sync your iPod Touch.
The main benefits to using this method, rather than streaming the porn movies to your iPod Touch over wi-fi are:
1. You always have a digital copy of the iPod Touch porn movie.
2. You can build a huge personal library of iPod Touch porn movies, and use iTunes to easily pick and choose which ones you want on your iPod Touch at any given time.
3. You can watch them even if you don't have wi-fi access to the Internet.
More and more services are catering for iPod Touch users by making their videos/movies available in QuickTime, an iPod Touch/iTunes friendly format. Though it's worth noting that they nearly all name their services 'iPhone' as opposed to 'iPod Touch' - No matter though. They work on both devices.
Should you opt for a porn service that hasn't taken the time to make the movies iPod Touch compatible in QuickTime, your iTunes software may convert downloaded video files to a friendly format and transfer them to your iPod Touch, but you'll need to check with them first.
Essentially, you just view the porn site using your Mac/PC, download/save the porn video to your hard drive and then sync it to your iPod Touch using iTunes.
