They say don't have s*x, while you're doing ex, because it'll ruin the experience forever if you go back to normal life. It's kinda like fight night for a gambler. If you're a fight fan and you don't have the money to play one day, an underwhelming card can be 2000% less exciting, even if you're a hardcore fan.
But you did get some GREAT advice! "Don't play what you can't afford to lose," I'm not sure it's only 2x more exciting though, depending on how you play, it could 10x more exciting.
Just don't be stoOpid!
Underdog lines at bestfightodds.co m are fun to watch, especially once you start understanding how to "play the odds". And how do you wanna bet? Straight betting and parlays are much different, do you wanna just do one or the other or both? It's worth considering.
(Parlays are pickin' 2+ fighters to win, but to win the bet, you must win all fights in your parlay, but what makes that fun is that if you can predict a few fights right on a card, the reward could be 800% your wager. So it's a low risk, high reward way to play) Or you could individually bet on fights, that's how I like to do it. A +250 underdog means that if you bet $100 on him and then he bites, you'll get your bet money back +$250 or 250% your wager.