Not an adopter myself but just thought it may be useful for you to know that in the new Avengers film there is a nasty adoption related joke. I haven't seen the film myself but ds saw it last night and said the baddy is the brother of the hero. The baddy's evilness is explained away in a joke 'Oh he's adopted'. 
Ds thought it was very funny
so after reading all your posts on here be assured I put him straight.