Just Friends?

[AngieDoogles]

So I've been trying to think of a good question to ask you "man," but nothing came to me at first. Well, today I was thinking about the movie "When Harry met Sally" and their conversation about men and women being friends. We've had a thread or two about that here as well. Harry basically says that men and women can't be "just friends" because emotions always get in the way and the man always thinks about sex. He says that it is even further complicated when either the man or the woman has a significant other. Anyway, my question is what is your take on this? Do you think it's possible to be "just friends"? How do you think this would affect the significant other? Do you think it's okay to have a best friend of the opposite sex when you are in a relationship with someone else?

Thanks!