why are brains so ridiculous?

Mine currently responds to even slightly suspenseful moments in fiction, even ones that I know will be okay, like in romance, with a strong urge to abort and avoid in favor of weird displacement activities, like playing a some game or making a cup of tea or scrolling through Tumblr.

I already read soothing, fluffy things, what more does it want? These phases are very annoying, and disruptive for immersive reading.