The one for chapter 5 is weird. NOT developed well as a 3some, so very odd. The first is REALLY good (5 seconds) and I really liked the second story (the twins). The "stalker" was a bit weird, too, but not bad like the 3some.
Last one is porn star and his cameraman best friend. Star is (duh) in love with best friend and only picks fellow actors if they look like the best friend. BF is in love with star and is shooting the scenes to be close. They hit a breaking point and bf drags star over and fucks him in front of the camera and everyone (and they finally get their heads out of their asses). Last page of that one is the star getting into regular TV with the bf directing him.
5 Seconds