Are pornographic photos allowed on Facebook?

I’ve just started a Facebook account a few weeks ago and have enjoyed catching up with old friends from high school. I added a friend that I haven’t seen in years who is a bit on the eccentric side.

This morning I noticed on the highlights part of my home page a group of photos that this person posted with a woman performing oral sex with a man.

Is this allowed? If it is, how do I get this off of my home page? If it’s not allowed, how do I report this? I’m getting tired of looking at this every time I go to my home page.

Any help is appreciated. Thank you.