Quinn Fabray is not obsessed with Rachel Berry's mouth.
It's not her fault that Rachel has these full, pouty lips that are the very definition of kissable. (Seriously, they positively scream kiss me). Or that she has perfectly straight, white teeth (except the one barely-noticeable chip on her front tooth that was never fixed after a slight mishap involving a pinata and a metal pole when she was six, but Quinn just thinks its adorable), which serve as the centerpiece to a smile that dazzles and mesmerizes Quinn every time. Or that when Rachel smiles that one smile-the one that is so genuine and happy it makes Quinn's heart skip a beat in the best way possible every time she sees it and double when she's the cause of it-it takes every last bit of self control Quinn possesses to not just grab the other girl and kiss her senseless. Really, she shouldn't be held responsible for things that are beyond her control.
But seriously. That mouth is capable of all kinds of magic. For starters, it produces the voice of an angel. It's impossible to not fall a little bit in love with Rachel when she sings. Try as she might Quinn just does not understand how such a tiny person can have such a big voice. And god, the girl never shuts up. She always has something to say. It does get irritating sometimes, Quinn has to admit. But then she remembers that time they got drunk and Rachel confessed that sometimes she likes to annoy Quinn on purpose because she didn't have siblings to bother growing up and Quinn's heart melts just a tiny bit and she isn't annoyed anymore. Besides, some of Rachel's "fun facts" were actually kind of interesting, and Quinn really likes the way Rachel's eyes light up when she speaks, and when Rachel rambles on for too long Quinn just stares at her lips forming words and its the greatest thing Quinn's ever seen. Not that she would ever tell Rachel that.
Just the sounds Rachel makes when Quinn does things to her (bad, dirty, sexy, wonderful, mind-blowing things) would be enough to spark an obsession, but then there's the way that mouth feels doing those same things to Quinn. She honestly feels bad for anyone who hasn't been afforded the pleasure (emphasis on pleasure) of Rachel's cunnilingual talents; years of devout church-going had never given her the kind of religious experience brought on by Rachel's mouth. Then again, Quinn has never been known for her willingness to share. The rest of the world will just have to understand.
But above all, Quinn loves kissing Rachel. All is right in the world when Rachel's lips are on hers.
Quinn is not obsessed with Rachel's mouth (except she totally is).