It's important when you're married not to forget those things you used to do when you were trying to get her to marry you. You can't send flowers and buy gifts then, when you're married, say, 'Right, get my tea on'. That doesn't go down well. So you've got to keep that level of interest going.
We can't any longer have the conventional understanding of genetics which everybody peddles because it is increasingly obvious that epigenetics - actually things which influence the genome's function - are much more important than we realised.