It must be extremely uncomfortable having a person under your skin! I guess the best way to avoid it would be to wear very tight clothes, have tighter skin, or use good lice powder, or in fact all of those options! I'm sure it must be very important also to remain alert at all times, just to ensure that you can quickly avoid any attempt by anyone hoping to get that close to you! I mean how do you know if a total stranger wants to meet you, just so they can enter your skin? What a terrible thought!