At first the West didn't accept Freudism and even was formally opposed to it. But the "seeds" of the "plague" brought forth "shoots" as early as fifty years later; we are speaking of the so-called "sexual revolution", a socio-cultural phenomenon in the Western world that entailed the reappraisal of traditional (family) values.
To understand its origins we should refer to Sigmund Freud's theory of psychoanalysis, namely his method of treating patients with mental disorders. According to the theory, a patient has all the instruments for his cure — for this he can become a psychoanalyst himself.
Supposedly some members of the human community in return for "social good" develop neuroses as their desires, suppressed by the yoke of public morality, remain unsatisfied.
And here the question arises: What will a society, some members of which decide to disregard social and ethic norms for the sake of their "mental health" be like? A split in society becomes inevitable.
In the early 1960s the "sexual revolution" broke out in the West. True, Freud himself wasn't its ideologue in the full sense, but the high priority he specifically gave to all that's sensual and sexual in human psychological life played its role. The Western world was inspired by the ideas of liberation.
Comment: See also,