I was just browsing the internet when I randomly found this site that makes custom pillows for example you may print your own face on it.
So I thought of this opener:
me: Hey can I ask you something?
hb: Yes, sure.
me: If some guy would give you a pillow with his face printed on it, how would you react?
hb: I dont know/laughs etc etc

Then u can just escalate conversation saying things like:
Wouldnt it be nice to just sit on his face without getting a lawsuit?
or
To wake up every morning next to his beautiful face?
or
To cry yourself to sleep every night against his face?

I tried this quickly on a shopkeeper last night and i got a few giggles and smiles, but im not sure if it works on everyone.

I actually like the quirkiness of the question, but some of your follow up comments are lame. Talking about sitting on his face?!? That's a creeper comment bro.

I might try to pass this off as something real that people are doing for the holidays. Say that there is some website that is making these custom pillows for people. If she says it's creepy, tell her that you think it would be funny. If she says she thinks it's funny, tell her you think it's creepy.

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“Nothing is impossible, the word itself says 'I'm possible'!” ~Audrey Hepburn

Yeah maybe the sitonface thing is a little too inappropriate considering that you just met this girl.
But it could work little later when the girl is comfortable enough

can you link pillow website?

yeah, its http://www.pillowmob.com

This is a pretty good opener

I remember this one time I was at this anime convention, and they were selling body pillows printed with anime girls on them posing in sexual ways. I thought that was creepy lol so maybe you could ask her about that.

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"I've learned it's important not to limit yourself. You can do whatever you really love to do, no matter what it is." - Ryan Gosling