the DIFFERENCES in the expression of AffEcTion between men and women...

First, while women tend to express affection through words, men prefer action. Men express love by doing things like picking up her dry-cleaning, getting her car cleaned up and working long hours at a job they dun like.. Many men find it hard to actually say the words "I love you," but they show it.
Secondly, men rather be side-to-side compared than being face-to-face like women. Hiking, watching a game, sitting together in the front seat on a road-trip - these are the intimate moments for a man with his partner. Men are not so much into sharing feelings as sharing space.