If you are actually interested in that kind of stuff, I might recommend this book: The Mathematics of Love by Hannah Fry. You can also get it on Kindle; she does the reading herself. It's basically all about how math ties into romance, and how you can use math to help you do better at dating, or just understand how certain things work.
She has a few videos on Numberphile on YouTube, and she just seems like a really fun person in general.
Some mathematician codified the mathematics of love. We can do more with more powerful measuring tools / computers. Till then, we act on estimate.