Twins talking in their own language

[Spaced]

I'm always amazed by twins, especially cases where a) they turn out completely different despite being raised the same and having ostensibly the same genetic make-up and b) when they are adopted and grow up separately but acquire the same tastes and habits.

I remember seeing a documentary about twin sisters where one was autistic to the point of spending most of her time watching the colours her spit made when rubbed on a computer monitor and the other was an honor student with a massive IQ. I also have friends who are twins and one is heterosexual and the other is homosexual.

I think this gives us a chance to see how genetics only make up a part of who we are.