Harry didn't seem to quite get the ~point~ of the game at first...
But Ellen quickly set him straight.
And things started to take a turn for the ~scandalous~.
Thankfully, the boys were quick to deny that any of them had dated a bandmate's ex...
But the next question got more than a little bit interesting.
There's no turning back now, Harry...
You can watch the hilarious game in full here: