Cybercriminals will try just about any tactic they can to get you to click on and accept their malware.  One of their most successful have been scams related to pornography. These scams surround the possible situation that the cybercriminal has in their possession pornographic videos or photographs that they got by monitoring your computer activity.  They often claim to be in possession of webcam activity and they will release them to your friends and family, unless you pay them. It is a popular form of electronic blackmail that has been made popular by bitcoin.