The women I have talked with all agreed that men are lazy when it comes to understanding women. Since men are not emotional based they tend not be aware of and do not make effort to understand this about women.
Men being physically oriented love the chase and the action around the chase. Women love the chase from their perspective and want it to continue. Men get in a relationship with the woman they chased and then they stop chasing. Men are now in a relationship and the energy stops. Now the energy is headed in another direction. Men now turn their attention to work, friends, sports or maybe just television. Not to say they aren’t still sexual for a while, but not so passionate, I think. Women being emotional want the attention they have been receiving. Women work on the relationship and men just coast because they are in a relationship.