Lets take a moment to define the type of "friends" at least I am talking about. Because a friend can be basically anyone you know enough to call by name. I think the best way to define what i'm talking about would be to use the frequency of communication they have together. I have friends I talk to maybe once a month or so, and I have friends I call every day and just discuss every iota of anything that happened to me that day. So when I say guys and girls cant be friends I mean the latter. A relationship that both of them take the time to maintain on a daily basis.
A) They spend time together.
B) They go out together alone.
C) They talk about personal things, like sex and relationships.
The first thing that makes this wrong is because one person (or both) almost always want more than just a friend. These relationships always have an aire of manipulation. Shes trying to maintain the orbiter, he's secretly trying to get in her pants, but not limited to only this. So they will maintain this facade for extended periods of time because they feel comfortable with each other. They like each other enough to keep this going, but they just can't/won't cross the line. All the while you show up with normal intentions and are thrust into this complicated stigmatized social system they have going on. Where she looks to him for validation when it comes to you, and he's jealous, closet hating and blocking your game. And all in her best interests of course because they are friends right. She kinda knows he's being biased but she's not entirely sure. Maybe he's right, maybe her new BF is just a player...<doubt has been instilled> And the roles just might be turned if the guy finds a girl he is interested in.
When I say guys and girls can't be friends it doesn't mean it's impossible for the thing to exist. It means that in your relationship with a woman it should not exist. It means that it's not the same thing as the type of friendship you usually have with your buddies. It's more than that and as such it's not a friendship, it's something else. Some kind of Anti-sexual-relationship...
Guy's and girl's can't be friends... (past the age of like 5)