I come to think...
What X-Men barely interacted with each other?
I mean they are many and many generations. It is hard to think everyone is close friend with each other(considering that brain limite the amount of BFF to 5..hmm very fitting number for X-mens ain't it? )
So how the relation between X-men are exactly who are besties, who just a close pal, who an acquataince and who a guy who is kind fo there?