He may want to remember how it feels to play gambling. But many reasons for him to return and we will not know unless we ask him. Curiosity can be his reason to return and want to recover his loss. But whether he wants to return because of loss or other things, he must be careful and really strict with himself because addiction can catch up to him. He should limit himself and his budget so he just treats gambling as entertainment and does not try to make money because that can make him chase the wins.