Love has gravity.

When an object falls (in most cases), it’s either will break into pieces, retain it’s composition, or just be deformed; depending on what surface it’ll fall. (e.g. when an object fell on a soft surface like a foam, then it’ll retain its composition). In falling, you can’t defy gravity. Just like in love. It’s free fall. Falling in love will not only guarantee you a bad/hard fall but also a good/nice one. Because it’s either you get hurt or not. It also depends on who you’ll fall for. That’s why love is a risk. You have a 50-50 chance of either getting hurt or not.