I remember very little, I watched the movie around 2008, but I am pretty sure it is from the mid 90s. The scene I recall shows a black haired guy who is kept lying over a pentagram, with candles all around, in a sort of purification/tracking evil inside ritual. I remember an old priest or something and his blonde girlfriend near him, and the old man keeps saying he was broken/possessed by something evil. The blonde girl seemed really upset, and it all looked like a part of an investigation or imminent battle against demons of some sort (really not so sure about this part). The couple later had sex over a seemingly public shower I think. Can't remember anything else cause I had to stop watching it in the middle to sleep.
Which movie is this?