How common or rare is it to have a really intense chemistry with someone?

I’ve had a number of boyfriends in the past, but never has the intensity been as much as it is now with this new guy.

It just seems like a really passionate and intense chemistry, like it’s so mutual at the same time and I’m wondering if this is just really common for most people or hard to find?

How common or rare is it to have a really intense chemistry with someone?
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