Why are the women in these stories so desperate?

they are willing to throw away their pride and throw themselves at the guy. in story 3 he tells her he will only leave his sex friends if she satisfies him. pretty much telling her he wont be faithful. she tells him no, then the next day strips in front of him... what???

if this story had been longer, and he genuinely fell in love with her, i think it would have been believable, why would this guy give up sex with anyone for this girl? one page he is telling her to satisfy him, and then the next (when he thinks she has a boy she likes) he tells her not to give away her body so easily.... since when does he care if a girl sleeps around??? randomly after two days he is in love with her, he explains its because he was fond of her when they were children, that he loved her as a sister. which explains why he loves her now...???