Thanks reframe but judging by the lack of replies, I guess it doesn't happen often. Probably by the time you start dealing with the problem there is so much resentment that it's beyond fixing!
I think all relationships have a HD and a LD person so this is such valuable knowledge to have.
I am reminded of the Woody Allen movie(Annie Hall-I think) where he says - We never have sex, only 3 times a week. Then Diane Keaton (I believe) says we are always having sex - all the time like 3 times a week.
