Second chances

was just thinking...
if its not meant to work the first time round...why do it again....?
cos time is different and mentality is different?
attitude better?
Or one jus refuse to believe they failed in the first place...

if the reason of breakup is dat the guy/gal cheats...? 2nd chances wun be worth it
he/she will cheat again....its a fact always

why are people so dumb to believe??