Does porn give you a virus?

Yes, it does indeed give you viruses. A good way to avoid getting viruses is not going to those sites at all. But if you're planning to, then you should find yourself a good working anti-virus...

A lot do, if you want to be sure Firefox can tell you if a site is potentially dangerous or not.

It depends on whether or not the file you download is infected or not. It is really a hit and miss with any media file.

Yes, it is infact true. Visiting those sites can give you viruses. By visiting those sites, you are putting your computer at risk. I would suggest that if you are interested in watching it, then you...

Yes, it is more than likely it will. There are many viruses on many websites on the web.