John is not gay. He's not. All his life he's been sure of it. He's a straight man, interested in women only. Yes, he finds men... Attractive, but who doesn't? He's not gay, he just can appreciate a good looking guy. Yes, when one guy flirted with him at a bar he almost had a heart attack, but not because he was interested! No, not at all. John Hamish Watson is a straight man

So why is this so difficult? He just has to ask him out for lunch, that's all. It doesn't mean anything, because he's not gay. Yes, the guy is awfully handsome and he's been stuck in John's head since they met... But not because he's gay! Not at all, no chance... Right?