Dean Winchester went on a rant about how many girls he was getting, when he was textually lying and putting on a front. This was a macho straight dude persona, an act, and it was for the case and even the casual viewer understood that this was Dean lying, because it was part of how they planned to solve the case.
And then Dean drops the act, becomes Dean himself, and says truthfully that there are people and feelings he wants to experience differently, or maybe for the first time at all.
Like, if I have to hold your hand and walk you through that subtext, then maybe media interpretation is not for you.