I'm not sure if this is a bit too much for you (It would be for most girls..) but one of my friends did this to a boy, and they ended up dating. Haha.
So it was lunchtime, and she walked over and sat down next to him. They made small talk, and she suddenly asked "How many girls have you kissed before?" and he was like "Uhmm...4* I think?" so she said "Want to make it 5*?" They kissed.
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