I think it is fair to say that in PNR/UF novels, there are a few things that are expected and accepted:
The hero will be gorgeous and well hung. The heroine will be attractive, smart, perhaps funny, but most of all likeable and relatable to the reader. The story will have elements that drag us in, besides the two pretty people it centers on, and transport us to another reality. The hero and heroine will be irrevocably caught in the Smex Beam.“What exactly is a Smex Beam, Captain?” you ask. Ha ha, fear not reader. Your Captain is here to offer guidance and instruction.
The Smex Beam is the magic that exists the first time our fated lovers meet [...]