We meet people with our emotions locked away.
Over time letting them out one by one as we let people closer. Then eventually if we feel it's right we give people the keys to our hearts.
We expect them to hold that key like a precious jewel.
Some however just add it to a key ring loaded with other keys to other things.
Forgetting until it's too late what that key was for.
The day they remember, often the lock has been changed.