It's possible that different entities experience each other's experiences differently.. that is, if you were to magically teleport your experience of reading this post into my brain it might be overpoweringly disorienting and even painful. On the other hand it could just be "a little weird". Or would I instantly have everything that differentiates my mind from yours completely overwritten? This would probably catastrophically reduce my fitness because I'd have to--or more like you'd have to--learn how to operate my body.