~snip~
Probably you've learned your lesson already in gambling. You already know how it feels to fail in it. Most experienced gamblers know that feeling and they learn to atleast control themselves to never do the same mistakes again.
He or whoever never learned anything from gambling, They are only feel regret when they lose.
However, with that reason "for fun" I think there are still lessons to learn. Gambling isn't for fun, that would lead to more defeats.
So, gambling is for your weekly/monthly income/profit? Do that, and you will lose all your money.