I've seen enough hentai to know where this is going.
What someone who has seen a significant amount of hentai thinks when they see someone (potentialy a cartoon) being attacked by tentacles of some sort. Often refering to a situation in which the potential sexual outcome would not happen.
Television: *depicting seen in which someone is attacked by tentacles of a sort*
Inside head of viewer: " I've seen enough hentai to know where this is going.
Inside head of viewer: " I've seen enough hentai to know where this is going.