Bonnets, Look under Investigative Tips and you'll get more info. You might want to post your questions there too.
Adult Friend Finder is a site that is for anonymous sexual liaisons. It's pretty graphic and disgusting. Also, the company that owns it owns a few other similar sites like Alt.com.
A man would use AFF to find people to hook up with.
I think that you would need to find his user name and then look him up on the site. You might need to pay for a subscription to get any photos that he posted. Once you have his user name, you can google it - if he has multiple profiles on other sex sites, he might be using the same name. Google will capture that.
I'm sorry your H is on that site. It's not porn. It's just ads for hookups.