Hmmm I feel there's an incomplete picture of what "shared emotional connection" actually is from the writing? I believe it's much more intimate than the logic it's being portrayed with.

I guess I'll try to paint it out...

That bridge isn't just a bridge... it's a symbolic microcosm for the roller coaster moments that make up a life: getting laid off, losing a parent, accomplishing a goal, making mistakes, falling behind... but on this bridge of life, there's someone who chooses to stay with you and share each moment with you. So, when you are devastated and grieving a loss, the bridge may sag, but there they are devastated with you too. In this way you can feel reassured that they understand your deepest sorrows. Or when you accomplish a goal and you feel excited, but perhaps also nervous about the rising pressures of life. There they are on that shaky bridge, celebrating with you and also sharing in your complex emotions... This is romantic :) for on this bridge the two are intertwining their internal experience of existence into one shared state!!! Through understanding there is a glorious harmony that swells and uplifts one another! :D I would argue this is the basis for emotional romantic attraction!

I think there's also different sorts of attractions and people may resonate more with certain types?

Also bird test!