i really hope the first time dean sees cas after he forgets who he is, sam introduces him as his boyfriend as a joke because of the way they’ve been arguing latley, and dean is just like, “well i scored.” in that witty dean voice and winks at him. before anyone can say anything he’s like, “wait, so i’m gay? oh, no, i’m bisexual, aren’t i? figgin’ best of both worlds!” and as dean looks cas up and down, biting his lip and all, sam doesn’t correct him. castiel is awkward at first, but goes along with it, holding his hand as they walk place to place. when dean finally gets his memories back and realizes that cas, in fact, isn’t his boyfriend, he continues to hold hands, hug, and eventually kiss cas like nothing happened because forgetting his past made him forget all the stupid reasons why he told himself he wasn’t bisexual, or deeply in love with cas. forgetting everything made him remember a part of who he actually was, and made him forget why he was hiding it.
I feel the next ep will be such a missed op to teach Dean about bisexuality. Dean could be all "is this strong manly wrestler dude I look up to really flirting w me?" Sam would be all chill like "and?" Dean:"but he doesn't look gay, and Im sure he's dated women before" Sam:"maybe he swings both ways; bisexual." Dean:"bi-what-now?" & be enlightened by Sam, giving us glimmer of hope for bi!dean. But I feel the writers will just make some stereotypical gay jokes & be done with it. What do u think?