Why is everything so sexual with guys?

Me and this guy have been seeing each other for a couple of weeks. We are not dating or anything, but he always make some type of sexual suggestions. I understand that people would want a guy to find them sexually attractive, but most of the guys that I talk to it always lead to something sexual that they would want to do with me. Is that consider a red flag or that just something guys just do?
Why is everything so sexual with guys?
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