So there was an unanswered question of how the young Iceman can be gay when the older Iceman isn't.
Turns out that he is indeed gay -- but deeply closeted. Until an intervention by young Iceman and Jean Grey enabled older Iceman to admit that he is attracted to other guys, but has been afraid to come out.
It all went down in UNCANNY X-MEN #600, which came out yesterday:
There has been speculation by some fans for a long, long time that Iceman is gay. He occasionally dated women, but rarely for long and rarely was it serious. Otherwise, he's been pretty much a loner for most of his life. On top of that, his father is a huge bigot. An anti-mutant bigot, but I'm sure he hates gay people also. I can see why it's been so difficult for him to come out before now.
It will be interesting to see how things evolve with two gay Icemen running around the Marvel Universe!