According to Sheila Jeffreys, in Western countries, "sexual liberation" ideologies have aggravated the problem of male sexual entitlement, leading to women submitting to unwanted sex not only due to physical force or illegal threat, but due to societal pressure: "The force which has operated on them all their lives and continues to operate on them within marriages and relationships remains largely invisible. [... Such forces include the massive industry of sexology, sex therapy, sex advice literature, all of which make women feel guilty and inadequate for any unwillingness to fulfill a man's sexual desires."