Apparently, this is in reference to disgraced PR exec Justine Sacco's now-closed Twitter, which recieved recent media attention for a tweet she posted about not getting AIDS in Africa because she's white.
This post must've caught Chris's eye:
I had a sex dream about an autistic kid last night. #fml
— Justine Sacco (@JustineSacco) February 24, 2012
...and he proceeded to make it all about himself yet again. The "bragging", if you can call it that, being about the fact that at least one woman out there has hidden desires for autistic men like himself. (Which evidenced by the #fml hashtag, is obviously untrue.)