What to do .. ?

Recently I started talking to/getting feelings for this guy. He's my type, and we get along really well.
​Problem is, lately all he's been talking about is sex. Literally 24/7. Everything I say he makes it sexual, or if he he starts a convo, it's about something sexual. Don't get me wrong I am a very sexual person, and when we first started talking it was fun to be permiscious but I'm kind of getting tired of it now.
How do I hint or tell him that it's pretty much annoying? I'm afraid that he may only care about sex, but I'm sure sure considering I have seen a "normal" side to him that I do like.

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