1. Do not tell them they have weird hair, or eyes, or feet, or any part of their body hmmm maybe just stay away from their body ;)
2. Touch them a lot, wait no, that seems keen, don't touch them at all, wait no that seems unkeen, just ignore the touching rule...
3. Smile! But not too much, then you look insane, or like you have a mouth problem, don't smile, no then you look sad, they might think they've accidently stood on your pinky toe, just look normal.
4. Fiddle with your hair, not too much, they don't want to think you have lice, or a strange hair obsession, maybe don't touch your hair...
5. Laugh, not randomly, then they will be f.r.e.a.k.e.d out, but don't act like an emotionless potato either, maybe just laugh but don't laugh...