Going back to Keane..... Fuck that....
That would be like going back to an ex that was the worst root in the world. You know it's going to be a dud root, but you've been on a dry spell for a week or two and you know better, but you have 20 tequila shots and think 'fuck it', it's only a root...
and in the morning, you've got a hang over from hell, you've dumped a load and the dumb bird tells you she ain't on the pill and you can't find a loaded dinger or busted wrapper anywhere... and she wants to get back together.
Your life flashes in front of your eye..... and you know your fucked.
That experience would be the same as seeing Keane back.