Okay, if you didn't see any of the X-Men movies already, and you don't know the comic, than this quote of McAvoy's I've put under the cut is a spoiler. (McAvoy plays Charles "Professor X" Xavier in the film.) Other than that,
For the record, McAvoy would have preferred it if Xavier and Magneto stayed together. Like, really together. "It is a little bit of a mini-tragedy that him and Magneto don't, you know, have sex and become married and become best friends."
Rest of the interview is here.
\o/