Can aliens life in human bodies?

Can aliens life in human bodies?
So we humans tend to have 2 arms, 2 legs, a thin neck with a head on it. We have seen actually physically not the cleverest species on the planet and the only thing that makes us so dominant over other creatures is our intelligence (sometimes). But you ever notice is the 90% of all aliens in the film theory and the same basic form as we have? With truly minimal physical changes. What makes the two-legged form so superior that it has become the standard form for almost all the theoretical extraterrestrial life forms? The answer might be yes!