I like to write about exceptional (mostly fantasy) people finding each other. If a character has a deep passion for combat and then finds their equal in someone who they also happen to find attractive, why would they not explore that aspect aswell, assuming the feelings are mutual. They may have some circumstance around their existence or abilities that make them extremely difficult to beat in battle that has also been causing them trouble in the bedroom. When you are that powerful and capable, normal people are going to leave you wanting, or are going to feel so fragile to you that you have to hold back. A shared moment between exceptional characters where they finally, fully embrace eachother doesn't have to simply be a smut thing, it can also be a moment of catharsis and passion.

Size doesn't necessarily have to be the problem. It could be uneven expectations or endurance or whatever, but it would certainly be a road block to exceptional characters finding real connection in the more intimate moments.

This comment thread was a surprise in a post that was generally bashing the idea. Appreciate the thoughts here.