He has a pregnancy fetish?!

So maybe glow isn't the place to post this, but I recently started dating an amazing guy. He's totally perfect. But yesterday during sex he said he wanted to like pretend I'm pregnant. Like he wanted me to stick out my tummy and say like look what you did to me.
This sounds like a sick joke but it actually happened! 
Should I keep seeing this guy?
Is this normal?

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