How do you know if the guy you’re on a date with is only interested in sex?

So I got asked out on a date randomly on a day out, I agreed but now I’m worried if he just thinks it’s for a hook up?

We haven’t talked much but so far he seems very polite and respectful. What are some clues to look for that he’s just trying to get lucky for the night?
How do you know if the guy you’re on a date with is only interested in sex?
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