The Rites of Uranus (1975, US vintage, full movie)

I, the High Priest, command that this novice, Sarah, be allowed to enter the Temple of Love.

Take her, and instruct her in the rites of Uranus.

I am always with you, and henceforth I shall speak to you through this horn.

You are about to undertake one of the most meaningful and fulfilling experiences in your life, Sarah.

To thank me as this ceremony, you have to be silent. You must be silent.