Well, he's actually 19, I think he does it on purpose though he swears he doesn't mean to..... I tell him not to spoil things for me and then he says "Ok, I won't say anything about him/her" Or, when we were talking about the different endings in ToS he said that Kratos's ending was different because of a certain reason. I told him not to say anything more, but then he said that it was something like Star Wars. Ugh, I swear, he better either not talk to me about things like this or not go on TV Tropes anymore.