I agree with mendacious. You are essentially looking for the board to pair for u 2 have ur high 2 pair. If I put someone on AA and dont think that they have the Ac or a flush draw then heads up this is worth-while to take. He has a ton of outs to improve and beat you. Side note: I dont like being the first one raising EP with AAxx, you're out of position and people can peg you on having AAxx, which is always a significant disadvantage.