Twilight and Fifty Shades of Grey have many similarities. However, they differ in their treatment of sexuality. The sexual attitude Meyer wants her characters to follow - that is, the attitude the male lead promotes and the female lead complies to - is one whose principles Meyer knows, that is widespread, discussed, and endorsed in a culture Meyer is part of, and that she wishes to portray realistically yet positively. This is because she hopes Twilight will make this sexual behavior - abstinence - more appealing, rather than the reverse. James has no such goal in Fifty Shades, and thus no such need to portray her characters' sexual behavior, morality, or culture in any way but the one she believes will attract readers.