Susan Shaw said this quote

When it comes to sexuality, romantic love plays a large part in feminine sexual scripts. Research suggests that women make sense of sexual encounters in terms of the amount of intimacy experienced; love becomes a rationale for sex. If i am in love, women often reason, sex is okay. Men more easily accept sex for its own sake, with no emotional strings necessarily attached. In this way, sexual scripts for men have involved more of an instrumental (sex for its own sake) approach, whereas for women it tends to be more expressive (sex involving emotional attachments). There is evidence to suggest that women are moving in the direction of sex as an end in itself without the normative constraints of an emotional relationship. By and large, however, women are still more likely than men to engage in sex as an act of love. Many scholars suggest that romance is one of the key ways that sexism is maintained in society.