A. They're HOT
B. They are both ALWAYS the hottest one in their relationships so it might be nice to see who gets to be top dog.
C. They will make the streets safer for other celebrities because the paparazzi would pretty much exclusively follow them (and their exes so there was something to put in those little boxes US Weekly liked to ad in their cover stories)
D. They would both go in KNOWING it was going to be short-lived. She's like 15 and he's...JT.