Who has been engaged in heterosexual relationships for 50 years worth of stories, who has never had any indication that he was conflicted with that fact and never expressed any kind of physical desire towards another man.
But I guess they could make him come out in an effort to sell books or something.
2) The whole 'been around for # years' thing, is again, bullshit reasoning (no offense.) I mean just 15 years ago, people were seriously boycotting TV shows for having gay characters on them. You think that you could just go around throwing homosexual innuendo around willy-nilly? Not saying that they should, but it's silly to make the argument.
3) It was a joke. I really don't care what Steve Rogers' orientation is. Doesn't make him any less or more of Captain America than he already is.