I don't think it so much has to do with "is it a dick move to date someone else's ex?" When two people are seriously involved for a year (which is how long Jeph said it was, can't find the link but if anyone wants to back me up...), and they break up, there are a series of events involved, not just one. This is why people constantly ask how their ex is doing, particularly if they're the one who got dumped. In a way, they want them to hurt. As long as they're not complete dicks, they don't want their ex to be miserable, but they do want him or her to have a sore spot in their psyche from the breakup. It seems like a really selfish sentiment but if you examine it it's not. When someone breaks up with you, they're rejecting you, one way or another. When you hear that they're still hurting inside, it means that they really did love you and even though they're rejecting you, they're not doing it out of an unfavourable opinion of you or because they latently hate your guts. It means that you were something so special to them that they haven't been able to rationalize the idea of making their life alright without you. When they start dating someone else, the metaphorical boom is dropped. They've done it. They've come up with a way to be content without you. It's an entirely new experience, because the way our society is built, we're taught to believe that true love is forever, meaning the love you thought you shared wasn't really "true love". I genuinely have no idea if I believe that or not, but there's at least some grain of truth to it. There's a lot of layers to it, most notably the uncertainty that comes from having to believe that you weren't able to tell that your love wasn't real, and wondering if you'll ever know for sure since you just turned out to be so wrong when you were so certain.
This is why I do believe that you should ask permission to date a friend's ex, only if you'd be the first one to date them since your friend. You're not just asking for permission to be with a person, you're asking for permission to be the one to shatter your friend's perception of what the relationship they had was. You're asking permission to be the one to send them into that period of doubt and what's almost the second breakup. It has nothing to do with being possessive over a person, it has everything to do with the consequences of being the one to force your friend to come to terms with something they may not be ready to do yet. Sure they'll have to eventually, but if it was someone else, they could put the face of their anger and dejection on a complete stranger. Instead, they're putting it on a friend.
Odin, we're already in an argument in another thread, so I don't want to seem like I'm dogging you personally and deliberately, but I think I can shine some light into this situation. Personally, I'm not offended by the fact that you don't think it's inappropriate behaviour to ask out a friend's ex because clearly, in your social circle, it isn't. Maybe you guys are just less sensitive than the people arguing with you, and that's not a bad thing or a good thing. It all has to do with how much value you place in the concepts of love, friendship, possession, and so on and also in how you deal with a breakup. There's nothing wrong with that. No one gets too deeply involved, no one gets hurt. My issue is that my social circle doesn't work that way. And while I would never want to inflict my standards on you or your friends, I do take issue to you saying that I and mine are immature and childlike because that's not how we do things. You can say I'm immature and possessive, and I can argue that you're shallow and don't feel emotions as strongly as normal people, but at the end of the day we're just standing on opposite sides of the shoreline screaming "My completely subjective standards are better than your completely subjective standards!" I've been studying philosophy for a very long time and I've been searching for any kind of framework to state that one person's socially-related emotional makeup is objectively better than another person's, and it just isn't there. What you're doing is assigning psychological characteristics to people to explain how they allowed themselves to be wrong when you haven't actually explained why they're wrong, and you're not going to. Unless you can poke a tangible hole in my mindset, leave me to it, and we'll leave you to yours.
As far as I'm concerned, the argument as it pertains to the comic is whether or not it's a dick move in the QC social circle. Based on the fact that even Tai seems to think it is, I think it's safe to say it is.