They are then instructed to take the information learned, and then create the "perfect woman" for the target.

Adult Friend Finder is one of the premier adult dating sites.

Adult Friend Finder uses cutting edge technology features and has a massive customer base.

It's not just guns and drugs that are up for sale on deep web sites.

Vendors also list guides on how to commit other illegal activities.

Business Insider obtained a PDF guide that is sold online for just £2.59.

It details how scammers operate fake dating site profiles in order to con men out of money.

Millions of people are finding sexy partners online for everything from one night stands to long term relationships.

Casual dating is not what it used to be, and maybe even not what you think.

The documents are often sold for small amounts of money, but the price barrier, the need to pay with Bitcoin, and the fact that they're only available on the deep web prevents the guides from being circulated widely.