manny pacquiao VS mayweather????

I always hear of this matchup, but it constantly seems to be avoided. Is there a reason why this hasn't happened yet? (I'm sure it's been proposed to these two already). Do they really not want to fight each other or is somewhere along the lines of different weight divisions/regulations sort of thing?

 

Manny said - he is ready to fight buy unfortunately mayweather always comes up with excuses. He doesnt to loose his title, for now. But it will happen one day

 

after reading the recent news, mayweather will be fighting cotto, a light middle weight, and if he wins, he expressed his interest in fighting sergio martinez, a middle weight, pacquiao will no longer go up in weight and most probably mayweather will no longer go down in weight or fight pacquiao in catch weight.so the fight everybody wants to see will not happen ever.

 

Mayweather have too much excuse to sign the contract,i don't think this fight will ever happen...

 

I say winner take all !!! still mayweather dad will say it wont be fair, so no fight .. then JR will beat up ex-wife/GF again just to make himself happy he didn't fight pacman..and to think of it now, I think the security guard mayweather punch or abused probably looked like pacman

 

manny pacquiao.....

 

This fight is next to impossible.