Steve Rogers as innocent & untainted - why it don't float.

People commonly characterize Steve Rogers as a sweet, innocent, pure little thing who blushes at curse words and practically gets the vapors at the mere thoughts of sex. However, this is hugely problematic because it flies in the face of everything we've actually seen about him. Sure, his behavior is generally pretty clean cut, but let's look at the facts.

• When Steve heard Howard Stark use the term "fondue," he immediately assumed it was a euphemism for some kind of intimate activity. In other words, upon hearing an unfamiliar word his mind went straight to the gutter.
• Steve swears. He's said "hell," "damn," and referred to the Chitauri as "bastards."
• After Bucky's apparent death, Steve tried to get drunk. It didn't work due to his metabolism burning off the alcohol too quickly, but nonetheless he tried.
• Finally, Steve spent a considerable amount of time in the army. That alone would have knocked any innocence he ever had out of him.

Steve Rogers, technophobe? NOPE.

Steve is commonly portrayed as being so technologically clueless that it's almost as if he came from the 1840's rather than the 1940's. Even relatively simple objects such as microwaves and cellphones leave him hopelessly confused. But this portrayal does not hold up when you consider that in World War II, Captain America was using technology provided by Howard Stark - in other words, the very cutting edge. Steve also had to fly a HYDRA plane, which at the time he had no prior experience with. If he can manage cutting-edge war technology, everyday appliances and electronics probably aren't going to be that big of a deal.

Steve Rogers doesn't have to be completely culturally illiterate.

Sure, Steve's going to have a lot of catching up to do when it comes to culture past the 1940's - but people fail to recognize just how much would have been around in his time that would still be recognized today. For a start, there'd be Batman, Superman, A Christmas Carol, Dracula, Frankenstein, Phantom of the Opera, Pinocchio, Fantasia, Metropolis, The War of the Worlds, and Snow White. He would almost certainly know who Albert Einstein was, and would likely have some familiarity with Nikola Tesla. Odds are he's seen the artwork of Norman Rockwell and Salvador Dali. At Christmastime, Steve would recognize tunes such as Carol of the Bells, Angels We Have Heard On High, Away In A Manger, and quite possibly White Christmas.

In short, there are lots of things he'd know about. Take a few minutes to do a little research, and you'll find a wealth of things that Steve could realistically know about.