Not sure if there's someone who already lose their money but still happy about the result,
The only way to do it is if you have planned and calculated it beforehand, yes, it is something strange, not all players do it, only those who have enough discipline can achieve it, it is not easy because you have to deal with emotions, impulses, even with possible Premonitions that you are going to win, but you have to be very focused to achieve it , if you limit the money to play you can achieve it.
Sure do, as the amount is allocated to it whatever will be the outcome you are good to let it go, though still got something in terms of emotions when losing your money the best way is not to expect too much and treat it as part of your entertainment, from that side you'll be able to react the right way, as gambling even how good your anticipation was there's always a big risk behind once you already place your bets.