A/NI learned that Mystique and Xavier had a rather…steamy past at one point, which I guess lead to this. Weird things happen when you can't get to sleep…
One night, Wolverine couldn't sleep, so he decided to wander the Mansion, one of his late-night past-times.
Unfortunately, that night he discovered more than he bargained for.
The X-Man walked into a sitting room where a television was on. The Professor was seated in front of it. This was normal. What was on the screen was not.
"Charles…Holy shit, is that PORN?" Wolverine asked in disbelief.
"Yes, Logan, it IS porn," Xavier said calmly, like he was watching Animal Planet. Well, it kinda was like Animal Planet…
Wolverine looked closer and then wished that he hadn't. "Holy fucking shit, is that YOU, Chuck?"
The Professor turned to Logan. "It's a sex tape of Mystique and I a long, long, time ago. She sent it to me a few weeks before."
"You actually sound wistful about it."
"Well, it's not every day that you get to make love with a shapeshifter. Besides, I haven't had sex in ten years. Do you know how long that is?"
"Uh, didn't really need to know that."
"You can watch it with me, if you'd like to."
"Um, no thanks."
And that was the night Wolverine learned that Professor Charles Xavier was a sick, sick man.