My wife is ND, and she loves to be busy. She teaches, coaches, officiates, has 3 boys all into sports, walks everyday, rund the house, reads most days, will do just about anything, to avoid having to be intimate with me.
On her list of thngs she wants to do, sex is about 6,531 on the list. My guess is that LD spouses look for things to keep them away from sex.
