Joel Scanlan, University of Tasmania Image: krzhck - unsplashIt begins with a follow request. An 18-year-old male accepts one on Instagram from an attractive female stranger. She likes his posts, messages him first, friendly, flattering, quick to move the chat to a messaging app. Within an hour she has shared an intimate image and asked for one in return. The moment he sends it, the flirtation stops: pay, or his image goes to his mother and ever…