A/N: Sorry, I know it's short! Because of that, I'm going to give you all a hint at the next chapter's word, which I picked out of the hat about 50 seconds ago. It's starts with an "f." More coming soon! Enjoy!
14: Heart- a hollow muscular organ that pumps blood around the body; the source and center of emotional life, where the deepest and sincerest feelings are located and a person is most vulnerable to pain
Every time she smiled at him his hearts felt weird… It was this strange sensation he couldn't put a name to. It was sort of like they were… swelling. And then, at the same time, like they were melting. It was very new to the Doctor. He had always thought that nothing could swell and melt simultaneously. It just defies science. This was one of those things that shouldn't work, shouldn't make the least bit of sense, yet it does. It just does, there isn't an explanation for it.
Well, if he had to explain it, he would say her. River. His River. His hearts did that weird thing just thinking about her name. River. A gorgeous name for a gorgeous woman.
He looked across the room and saw her smile at him again. It was her normal smile, and, like usual, he felt his hearts do their swelling melting magic. It was just so weird. If there's one thing the Doctor doesn't know about, it's this. He'll have to look it up later. He already had in mind just the wording he'd use: 'the swelling melting sensation caused by looking at someone you love.'
Yep. That should do.