It is really true about Hollywood celebrities that an old dog cannot outrun a new one. The hot Scarlett Johansson and Sean Pean are no longer dating each other. They were rumored together last February and even went to Mexico together and spent a holiday there. Scarlett Johansson even moved in to Sean Penn's home. But now, they have decided to end their secret love affair with each other. Take not, they never admitted that they were dating each other. Sean Penn is already too old for a young and sexy Scarlett Johansson.