If you could shrink down to size and enter your body, through which orifice would you choose and why?

quick question how would you do this because you can't shrink down as well as enter your body at the same time so is this informative does this include duplication so that one part of me can shrink down or it's just just the same person shrinking down or i'll be going through a different perspective and shrinking like in a game how do yours does your one person shrink down and enter that same body that has shrunk down