this rings a few bells for me, that's for sure. I think lust has to be in there too though.
I'm sure loads of As are gorgeous people and react in ways we would find sweet and reasonable, but I have to mention that without exception everyone my A knows thinks that about her. Living with someone brings things out that noone else ever sees.
Remember that zero tolerance ad? George Jones singing "behind closed doors"? That rang a few bells with me too.