How do you explain this to a child?

I have a 9 years old cousin who stays with me for her summer break.

Yesterday I was netflixing and she sat down and watched with me.

In a movie people said “ I want to have sex with you “

And the kid thought that it meant that
“ I want to go on a date with you “ .
So how do you explain this to a child? Or you aren’t going to explain it? But without explanation what is what , a child can be in a confusion state 😅 . Lol
How do you explain this to a child?
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We watched a teen movie that rated 13+
How do you explain this to a child?
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