Random pleasure = Addiction

Casinos use face recognition technology to scan your face and remember your face. Casino slot machines only give the jackpot to the addicts that go there everyday. Because the casino knows they will give all that money back.

Neuroscientists do not celebrate every win, and they celebrate their losses. They know this trick because they keep it semi random. Celebrate all your wins and you will work less hard. Dont celebrate your losses at all and you won't be as motivated.
This is why you have to give yourself credit for trying and humble yourself when you're winning.

This is another reason why women can be very addicting to men random inconsistent sex.