Optimus Prime , strong, clever leader had a 'kink'? That's something that nor Autobot or Decepticon could ever imagine.But surprisingly he had one.

He loves seeing people cry.

He don't know why he likes it so much, he gets too exited is someone is crying. Maybe because of this he quickly tries to calm down someone if they're crying, just not to feel this painfully pleasant feeling from someone's tears. Not arousal but just pleasant feeling.

But one day he couldn't stop someone crying. And this someone were you.

You asked him for a private talk while everyone were on a mission.Optimus never looked away from Teletraan I , watching mission going.

And here he is , hearing you sobbing into his frame , he were standing here like a rock , he were patting your baco gently , trying to calm you down.

He tried to hold it together just not to laugh.