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13 Things That Happen When You Fall In Love, According To Science

Spoiler: It's mostly just chemicals.

So you have a crush.

1. You get all flustered when you're around them, your heart beats faster and your hands get all clammy.

2. Your thoughts about them border on obsessive.

3. You think they're pretty much perfect.

4. Your cortisol levels go up when you're falling in love.

5. In women, testosterone goes up, but in men it goes down.

6. If you're lucky, they like you too.

7. You can also expect euphoria, sleeplessness, loss of appetite, and a rush of motivation.

8. And when you finally kiss? SO MUCH DOPAMINE.

9. Kissing also makes your pupils dilate.

10. Your heart beats faster, too, and more oxygen reaches your brain.

11. The hormone oxytocin can also be triggered by kissing.

12. Over time, kissing appears to lower your levels of stress hormone cortisol.

13. Eventually the other hormones that went a little crazy will have returned to normal.

And if the relationship didn't work out in the end? You get to do it all over again next time.