And the answer, at least for about 98 percent of fans, is also simple.
But Floyd Mayweather versus Manny Pacquiao is a pipe dream. It may be the only thing left for each boxer, assuming Pac-Man gets past Timothy Bradley on June 9, but it's just not going to happen.
At this point, both fighters retiring looks more likely than them fighting each other does. It's sad, but it's true. Let's take a look why.
Floyd Mayweather wants Manny Pacquiao to take a random blood and urine test, which he once again reiterated after last night's fight, via ESPN:
"Cotto didn't have the problem taking the random blood and urine tests," Mayweather said. "Why shouldn't Pacquiao? If he's the best, take the test."
Pacquiao's camp has agreed to take the tests three or six months prior to a fight date, but that's not random enough for Mayweather.
Considering Money's complete abhorrence toward stepping in the ring with someone on performance-enhancing drugs—stating regard for his health and safety as the main reason—the inability to agree upon these terms seems like the biggest stepping stone.
Money, money, money
Both Floyd Mayweather and Manny Pacquiao stand to make a king's ransom—each—should they make this fight happen.
Of course, that's not enough.
Mayweather wants a 51-49 split, and Bob Arum isn't going to let that happen. Money May blamed Arum once again last night:
"Bob Arum is in the way," Mayweather said of the Top Rank promoter who represents Pacquiao (and once promoted Mayweather). "He's stopping the fans from getting what they want. Let's give the fans what they want."
Of course, Mayweather also dodged the questions about him demanding more than 50 percent of the money in the fight, so it's a little hard to blame anyone besides him.
Besides, how can you possibly trust a guy named after money with an issue regarding that little green stuff?
Pacquiao's political career
As time goes on, Manny Pacquiao is becoming less involved in boxing and more involved in his political career in the Philippines.
Pacquiao, the current member of the Philippine House of Representatives, has an election next year. If he beats Timothy Bradley in June, any fight besides Mayweather would be a step back.
If he's forced to go backward, he has good motive to just retire from boxing and continue his political career.