I have a friend in another state who was engaged to be married to her boyfriend in the Navy. The boyfriend was pretty much a prime example of the sort of agnostic modern pagan which our age is producing. She was raised a devout Catholic, intent on establishing a happy marital relationship. Though a devout Catholic, she did not confess the pre-marital intimacy in their relationship, and went to Communion regularly.
At a particular point, her dog began to bark and express terror at something invisible in her apartment at night, and every night refused to sleep anywhere but on the bed. Every night the dog would shake with fright, shaking the bed itself. (He was a big dog.) Then the girl began to hear growling in the air at night right beside the bed, and she would be struck and grabbed by an invisble entity! This would happen at all hours.
She contacted me (she knew me to be very religious) and I told her that I had heard of this. I explained that consummate physical and moral corruption – such as accompanies drug abuse and sex abuse and sex mixed with drugs, and also receipt of Communion after committing these sins – tends to generate this problem, and advised her to immediately commence obeying God’s laws perfectly, find a confessor she could trust and confide everything to him, pray relentlessly and keep sacramentals in the house.
It worked. The evil presence left.
The boyfriend left soon thereafter, too, however – he could not stand the extent to which she allowed her religion to interfere with sex.
And then, later, she contacted me and confided that her ex-boyfriend complained that the evil presence had followed him onto his ship!