The X-Men's controversial leader Professor X once admitted, in 1963's X-Men #3, that he was in love with the then-teenage Jean Grey, a disgusting «romance» that was thankfully never explored. Charles Xavier is a complicated teacher and leader for many reasons, but if Marvel Comics had allowed him to openly lust after a teenage girl he would truly be irredeemable, and original X-Men writer Roy Thomas has confirmed how creepy this was in an interview with AIPT.
When Jean Grey was first introduced in 1963's X-Men #1, as Professor Charles Xavier's first mutant student, the rest of her male teammates (Cyclops, Angel, Beast, and Iceman) were immediately enamored with her, desperate to get close to her by any means. In fact, Xavier grossly commented on Jean's attractiveness multiple times throughout the debut of the X-Men, made even worse by the fact that he admits to having a romantic attraction Marvel Girl, his then sixteen year-old pupil.
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Decades ago, in the pages of X-Men #3 by Stan Lee and Jack Kirby, the newly formed X-Men team are planning on going on a new mission to find some recently revealed mutants, with all the boys on the team clamoring to be paired up with Marvel Girl. Professor X stressed to Jean to, "Be careful, my dear!" and after Jean tells him not to worry Charles has a pensive face on and thinks, "'Don't worry'! As though I could help worrying about the one I love! But I can never tell her! I have no right! Not while I'm leader of the X-Men, and confined to this wheelchair!" This thought by Xavier is problematic in truly so many ways, not least being the fact that while yes he himself acknowledges that it would be inappropriate
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