Am getting divorced. I can't imagine sleeping with anyone else and in my late 40s now, another relationship might not happen in any case?
Honestly, it is the least of my worries at the moment and I think I will mind a lot less than I thought I would. It's still a strange idea to wrap your head around though - never again 
Also, the person I want to sleep with is H (if things were not so dire between us), can't imagine another person's body.