why iam aware in this body, i mean why idon't self aware in another body?

You really believe you have a body? Elon Musk, the CEO of Tesla and Space X, believes we are nothing more than a computer simulation. “There’s a billion to one chance we’re living in base reality,” he said at a conference last year. Musk is just one of the people in Silicon Valley to take a keen interest in the “simulation hypothesis”, which argues that what we experience as reality is actually a giant computer simulation created by a more sophisticated intelligence.

We have little control of other bodies .