Why did she say "i wish we could be trapped in elevator"?

i saw two girls, I don't know if they are friends or not but one of them is a lesbian. Lesbian one didn't see me coming and said "wish we could be trapped in the elevator" to the other girl. Is she joking or are they lesbians?

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+1 y
i'm asking this because i like this other girl and hearing that dialogue grossed me out? do you think they are dating or is she joking?
Why did she say "i wish we could be trapped in elevator"?
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