Meg Griffin
Meg Griffin is a mediocre character from mediocre sitcom Family Guy. Despite being a cartoon character, Chris would like to nail her. Emphasis on would — Meg is 17 years old, and due to dumb laws, every time Chris proclaims his desire of carnal love from Meg, he feels obligated to voice his sincerest wishes that Seth McFarlane would "let Meg turn 18".
YouTube fetishism
In several occasions, Chris has given us too much information about his obsession with Megan. He once favorited an animation of Megan with expanding breasts. On 8 October 2009, he featured a clip from the episode "Road to the Multiverse" (depicting a hot alternate-universe Meg) on his channel, and posted a comment in the video where he said he'd "be all over her sweet pussy and breasts" if Seth McFarlane would let Meg turn 18.
Sonichu 10
Chris's insane fantasies finally came to a head in Sonichu 10 when Meg, who is mysteriously attracted to the sound of Christian and the Hedgehog Boys, suddenly appears and gushes about being a fan of his. Explosively, Chris admits to being a fan of hers as well. After dealing a rogue passer-by a knuckle sandwich, Chris and Meg get down to a bit of tonsil hockey and Meg promises Chris he can nail her. Hard.
Why her?
Chris is attracted to Meg because they're both pathetic, and so he sees her as a kindred spirit. Chris has taken umbrage to the fact Meg is treated so badly in the show in the past and presents himself in the comic as being her protector, even though the thought of Chris protecting anyone is patently ludicrous.