Yes good sex is a plus but you also have to be each other's best friend. You know when your having a bad day or your just upset about something you can go to them and talk to them about it you don't have to call a girlfriend up and vent you can vent or discuss the situation with them. a woman loves a good listener not someone that you say a few sentences and he is talking about his stuff and done forgot what the whole topic was about no we don't like that. You do have to have respect very much so if you don't start out having respect for each other in your relationship you can hang it up cause no respect leads to affairs.