as a pysc. major for 2 years it's just a cognitive hunch.
He puts that pic up when first arriving on the chat. board to establish a certain level of coolness on the boards. Everyone goes wild and like sheep they think "wow this dude must pull some big time ass" i.e. he's excepted due to the level of ass he pulls.
But all we really had was one picture that looked very suspect to begin with. Then he constantly makes posts about other girls and how to get girls. Fast foward a couple weeks and she suddenly is out of his life, banished for cheating. Now there was no thread annoucing the breakup or the fact that she cheated, and this guy posts constently. Plus he caught her fucking some dude, would this have not made a great thread. He wanted it to slip under thw wire, vthis was until people started to ask, then he devised a story.