So I'd like to ask you honestly - how is it "fun" when you lose money? What makes it fun - the prediction of what's gonna happen next? The winnings make it fun? But no one can win 100% of the times, right? (except for the house)
What makes it fun is the experience you get from it. The joy of betting to your favorite team and watch them win. Or the frustration of not getting the right bet because of the spread or handicap. The money lost is the expense you have to pay in order to have that experience and if you win, it is the added bonus.